£sd

  (Redirected from Pounds, shillings and pence)

A sampler in the Guildhall Museum of Rochester illustrates the conversion between pence and shillings and shillings and pounds.
Cash register in Ireland, with "shortcut" keys in various £sd denominations (lower numbers) and their "new pence" equivalent (upper numbers).
Toy coin, which teaches children the value of a shilling.

£sd (occasionally written Lsd, spoken as "pounds, shillings and pence" or pronounced /ɛl.ɛsˈd/ ell-ess-DEE) is the popular name for the pre-decimal currencies once common throughout Europe, especially in the British Isles and hence in several countries of the British Empire and subsequently the Commonwealth. The abbreviation originates from the Latin currency denominations librae, solidi, and denarii.[1] In the United Kingdom, these were referred to as pounds, shillings, and pence (pence being the plural of penny).

Although the names originated from popular coins in the classical Roman Empire, their definitions and the ratios between them was introduced and imposed across Western Europe by Charlemagne, King of the Franks. The £sd system was the standard across much of European continent (France, Italy, Germany, etc.) for nearly a thousand years, until the decimalisations of the 18th and 19th centuries. As the United Kingdom remained one of the few countries retaining it into the 20th century, the system became particularly associated with Britain. It was King Offa of Mercia who adopted the Frankish silver standard of librae, solidi and denarii into Britain in the late 8th century,[2] and the system was used in much of the British Commonwealth until the 1960s and 1970s, with Nigeria being the last to abandon it in the form of the Nigerian pound on 1 January 1973.

Under this system, there were 12 pence in a shilling and 20 shillings, or 240 pence, in a pound. Although the standard ledger accounting system recorded only pounds, shillings and pence, actual minted coins could represent one, several or fractions of these units. The penny was subdivided into 4 farthings until 31 December 1960, when they ceased to be legal tender in the UK, and until 31 July 1969 there were also halfpennies ("ha'pennies") in circulation. The perceived advantage of such a system was its use in some aspects of mental arithmetic, as it afforded many factors and hence fractions of a pound such as tenths, eighths, sixths and even sevenths and ninths if the guinea (worth 21 shillings) was used. When dealing with items in dozens, multiplication and division are straightforward; for example, if a dozen eggs cost four shillings, then each egg was priced at fourpence. Basic addition, however, could be more difficult than using a decimal system.

As countries of the British Empire became independent, some abandoned the £sd system quickly, while others retained it almost as long as the UK itself. The United States of America adopted a decimal system in 1792, 10 years after independence from the British Empire. Australia, for example, only changed to using a decimal currency on 14 February 1966, 65 years after independence. Still others, notably Ireland, decimalised only when the UK did. The UK abandoned the old penny on Decimal Day, 15 February 1971, when one pound sterling became divided into 100 new pence. This was a change from the system used in the earlier wave of decimalisations in Australia, New Zealand, Rhodesia and South Africa, in which the pound was replaced with a new major currency called either the "dollar" or the "rand". The British shilling was replaced by a 5 new pence coin worth one-twentieth of a pound.

For much of the 20th century, £sd was the monetary system of most of the Commonwealth countries, the major exceptions being Canada and India.

Historically, similar systems based on Roman coinage were used elsewhere; e.g., the division of the livre tournois in France and other pre-decimal currencies such as Spain, which had 20 maravedís to 1 real and 20 reals to 1 duro or 5 pesetas.[3]

OriginsEdit

The classical Roman Empire originally used a currency system based on the "as" with decimal units, e.g. denarius = 10 as, quinarius = 5 as, sestercius = 2.5 as, etc. The denarius (a silver coin) did become quite popular in circulation, but Roman accounting was actually done in sesterci units. Later Roman Emperors undertook multiple coinage reforms (e.g. Augustus in 24 AD, Caracalla in 215, Aurelian in 274, Diocletian in 293, Constantine in 312, etc.), redefining weights, rejigging their relative values and introducing new coins & new accounting systems for them. Emperor Diocletian introduced the gold "solidus" with its system of 1 solidus = 10 argentus = 40 nummus = 200 radiate = 500 laureate = 1000 denarius. Emperor Constantine created a new solidus at the rate of 72s to a new Roman pound ("libra") of solid gold, and a new accounting for it as 1 solidus = 2 scripulum = 3.33 tremisses = 4 semissis = 18 miliarense = 24 siliqua. Since most reforms were not even completed before the next reform began, the late Roman empire had a veritable mess of multiple overlapping systems of weights and currencies.

 
Carolingian denarius

Around the 780s the Frankish emperor Charlemagne cut through the mess of late Roman coinage by creating a new uniform system (some sources cite 755 and credit his father, Pepin the Short, but Pepin only begun the reforms, Charlemagne completed it). Charlemagne defined the Carolingian "libra", as a new measure of weight equivalent to around 489.6 grams (substantially larger than the old Roman pound of 328.9g). Charlemagne ordered 240 silver units known as "denarius" to be struck from the new Carolingian pound of pure silver, each denarius containing 22.5 grains of silver. To help accounting, Charles also decreed that the pound was divisible into 20 'solidi' (so 1 solidus = 12 denari). Thus began the £sd accounting system (L.1 = 20s. = 240d.).

The new coinage and accounting system was imposed uniformly across the vast Carolingian Empire, which then covered modern France, the Low Countries, and most of Germany and Italy. The system also infiltrated other countries on the peripheries of Carolingian empire. In the late 8th century, King Offa of Mercia imported the system into Britain to facilitate transactions (notably "Peter's pence") with the Roman Catholic Church (which used the Carolingian £sd system). But it was not the sole system in Britain - the £sd system would have to compete for a while with the Viking "mark" accounting system, introduced into Danelaw regions. Although £sd ultimately prevailed in Britain, the "mark of account" system lingered on in North Sea trade and areas of Hanseatic influence through much of the Middle Ages.

The £sd system prevailed across much of Western Europe. In French, it was known as the livre, sous and denier, in Italian as lira, soldo and denaro, in German as pfund, schilling and pfennig and in English as pound, shilling and penny. The English name pound is a Germanic adaptation of the Latin phrase libra pondo 'a pound weight'.[4] On the Iberian peninsula, the kingdom of Aragon adopted the Carolingian £sd system, given in Catalan as lliura, sou and diners, but the kingdoms of Portugal and Castile (and subsequently Spain) retained the currency system inherited from al-Andalus, the 'maravedi' with different multiples and subdivisions.

During the early Middle Ages, only the denarius was minted and circulated as an actual silver coin, while the libra and solidus remained merely units of account. So long as the silver content of the denarius was maintained, any quantity of money could then be determined by counting (telling) coins rather than by weighing silver or gold.[5] But the gradual exhaustion of silver mines in Europe in the 11th century led to a scarcity of silver and difficulties in maintaining coinage. Repeated debasements of the denarius coin by Medieval monarchs prompted eventually to minting of larger coins starting in the 13th century, such as the groat (from Italian "grosso" or "fat one") representing larger denominations of 3 or 4 denari. It also led to specification of currencies by mint of origin in contracts and accounting (e.g. a denier parisis, of the Paris mint, contained more actual silver than the very debased denier tournois of the Tours mint, so contracts written up in "livre tournois" represent a different silver amount than a plain "livre").

To facilitate larger transactions, gold coins began to be minted in western Europe around the same time - starting in the Italian republics in the mid-13th century ("florins" and "ducats"), and in other kingdoms in the 14th century (e.g. "ecu d'or" in France, the "noble" in England). Gold coins typically represented larger nominal sums. The French "franc", introduced in 1360, was the first coin anywhere to represent exactly £1. The gold "sovereign", first minted in 1489, was the first English £1 coin.

Although the £sd system remained intact in ledger accounting, the variety of new coins of various multiples and qualities led to common expression of quantities in terms of number of coins (guineas, crowns, farthings, etc.) But they would all have to be converted into formal £sd units in accounts.

The £sd system continued in much of Western Europe for nearly a thousand years, until the "decimalisations" of the 18th and 19th centuries. The United States of America was among the first to drop the £sd system and adopt a decimal currency in 1792. In Europe, decimalisation of currency (as well as other weights and measures) began in Revolutionary France with the famous law of 1795 ("Loi du 18 germinal an III", 7 April 1795), replacing the £sd accounting system of the Ancien régime with a system of 1 franc = 10 decimes = 100 centimes. Decimalisation was carried by French armies to neighboring European countries during the Napoleonic wars. By the mid-19th century, most of continental Europe had decimalised, leaving the United Kingdom as the only major country to continue to maintain the £sd system.

Britain considered following the continental example. A Select Parliamentary committee was set up in 1821 to inquire into decimalisation, but ended up recommending retaining the £sd system. However, pressure groups were formed inside Britain advocating the adoption of decimalisation of the currency, and Parliament returned to the matter in the 1850s. Various decimilisation schemes were considered - the Pound-and-Mil scheme, the Farthing scheme, the Half-penny scheme, the Alb scheme, etc. - but all were determined to have deficiencies, and transition would be too difficult and expensive. The £sd system would be maintained in Britain until 1971.

DecimalisationsEdit

All countries and territories that formerly used the £sd system have now decimalised their currency, with most decimalisations occurring after the Second World War. Malta decimalised its currency in 1955, while Nigeria decimalised in 1973. The British pound sterling was one of the last to be decimalised, on 15 February 1971.

In places where £sd was used, there were several approaches to decimalisation:

  1. The pound remained the base unit (in Malta, using the Maltese name "lira"), but was subdivided into new fractional units of ​1100 of a pound. The new fractional unit (called the "new penny" in the UK and Ireland and the "cent" in Malta) was worth 2.4 old pence. Malta also created a fractional unit worth ​11000 of a pound, called the "mil", worth 0.24 old pence.
  2. A new base unit (often called the "dollar") was created equal to ten shillings (half a pound), and subdivided into 100 fractional units, with one fractional unit (usually called the "cent") equal to ​110 of a shilling or 1.2 old pence. This was the approach adopted in South Africa, Australia, New Zealand, Jamaica, Fiji and many other countries.
  3. A new base unit called the "dollar" was created at parity with the United States dollar. This was done in Canada in 1858 and in many places in the West Indies in the 19th and 20th centuries. In Bermuda in 1970, as the pound was fixed at US$2.40, this made the new Bermudian dollar equal to exactly 100 old pence, with the new cent equal to one old penny.
  4. Some countries have adopted alternative approaches, such as Ghana, which created a new base unit equal to 100 old pence (not equal to the U.S. dollar), with a fractional unit equal to one old penny, Bahamas, which adopted a new base unit equal to seven shillings, with a fractional unit equal to 0.84 old pence, and The Gambia, which created a new base unit equal to four shillings, with a fractional unit equal to 0.48 old pence.
 
Conversion of some British pre-decimalisation currencies, and the decimal equivalent
New unit = x Old unit Year
  Maltese lira = 1 Maltese pound 1955
  South African rand = 0.5 (10/-) South African pound 1961
  Sierra Leonean leone = 0.5 (10/-) British West African pound 1964
  Ghanaian cedi = 0.4167 (100d.) Ghanaian pound 1965
  Australian dollar = 0.5 (10/-) Australian pound 1966
  Bahamian dollar = 0.35 (7/-) Bahamian pound 1966
  New Zealand dollar = 0.5 (10/-) New Zealand pound 1967
  Western Samoan tala = 0.5 (10/-) Western Samoan pound 1967
  Tongan pa'anga = 0.5 (10/-) Tongan pound 1967
  Zambian kwacha = 0.5 (10/-) Zambian pound 1968
  Jamaican dollar = 0.5 (10/-) Jamaican pound 1969
  Fijian dollar = 0.5 (10/-) Fijian pound 1969
  Rhodesian dollar = 0.5 (10/-) Rhodesian pound 1970
  Bermudian dollar = 0.4167 (100d., = US$1) Bermudian pound 1970
  Gambian dalasi = 0.2 (4/-) Gambian pound 1971
  Malawian kwacha = 0.5 (10/-) Malawian pound 1971
  Nigerian naira = 0.5 (10/-) Nigerian pound 1973
This table is not exhaustive.

The following table shows the conversion of common denominations of UK coins of the £sd system.

Common name Amount New £p
(e.g. UK)
New $c
(e.g. NZ)
Halfpenny, ha'penny 12d. 524p ≈ 0.2083p 512c ≈ 0.4167c
Penny 1d. 512p ≈ 0.4167p 56c ≈ 0.8333c
Threepence 3d. 1 14p 2 12c
Sixpence 6d. 2 12p 5c
Shilling 1/- 5p 10c
Florin, Two-bob 2/- 10p 20c
Half crown 2/6 12 12p 25c

The following coins were not in common circulation in the UK at the time of decimalisation, though the ten shilling note (sometimes known as half-a-sov) and the pound note were.

Common name Amount New £p
(e.g. UK)
New $c
(e.g. NZ)
Crown 5/- 25p 50c
Half sovereign 10/- 50p $1
Sovereign £1 £1 $2

The farthing, at ​14 penny, was never converted, as it ceased to be legal tender a decade prior to decimalisation. In 1971, a new penny would have been worth 9.6 farthings (making a farthing slightly more than 0.104 new pence). Similarly, the old halfpenny and the half-crown were not converted in the UK either, having been withdrawn previously.

Pre-decimal coins and banknotesEdit

United Kingdom pre-decimal banknotes are no longer legal tender, but are exchangeable for their face value (regardless of the possible greater worth if sold or auctioned) if they are taken directly (or posted) to the Bank of England.[6] The last £sd coins to cease being legal tender in the UK after Decimal Day were the sixpence (withdrawn 1980), the shilling (withdrawn 1991) and the florin (withdrawn 1993). Commemorative crowns minted post decimalisation (worth either 25p or £5) are still legal tender, but are rarely, if ever, spent.

In Australia, as of 2018, pre-decimal coins can still be found in circulation occasionally as 5, 10 and 20-cent coins.

The last £sd banknote to cease to be legal tender anywhere was the Isle of Man ten shilling note, which ceased to be legal tender there in 2013.[7]

Writing conventions and pronunciationsEdit

 
Notice board displaying the entry prices for the Theatre Royal, Drury Lane, London, around 1946

There were several ways to represent amounts of money in writing and speech, with no formal convention; for example:

  • £2. 3s. 6d. (two pounds, three shillings and sixpence), spoken, unless there was cause to be punctilious, "two pound(s), three and six". Whether "pound" or "pounds" was used depended upon the speaker, varying with class, region and context.
  • 1/– (one shilling), colloquially "a bob"; the slash sign derives from the older style of a long s for "solidus", which is also one name for the sign itself; the '–' is used in place of '0', meaning "zero pence").[8][9]
  • 11d. (elevenpence)
  • 1 12d (a penny halfpenny, three halfpence). As spoken, the lf in halfpenny and halfpence was always silent; they were pronounced "hayp'ny" /ˈhpni/[10] and "haypence" /ˈhpəns/[10][11] – hence the occasional spellings ha'penny and ha'pence).
  • 3d (three pence), with reference to the above, this became thruppence, commonly referred to as a "threepenny bit".
  • 6d (six pence) known as a "tanner" or half a shilling.
  • 2/– (two shillings, or one florin, colloquially "two-bob bit")
  • 2/6 (two shillings and six pence, usually said as "two and six" or a "half-crown"; the value could also be spoken as "half a crown", but the coin was always a half-crown)
  • 4/3 ("four and threepence", the latter word pronounced "thruppence" /ˈθrʌpəns/, "threppence" /ˈθrɛpəns/ or "throopence", -oo- as in "foot" /ˈθrʊpəns/, or "four-and-three")
  • 5/– (five shillings, one crown, "five bob", a dollar)[12][13]
  • £1.10s.– (one pound, ten shillings; one pound ten, "thirty bob")
  • £1/19/​11 34d. (one pound, nineteen shillings and elevenpence three farthings: a psychological price, one farthing under £2)
  • £14. 8s. 2d. (fourteen pounds, eight shillings and twopence – pronounced "tuppence" /ˈtʌpəns/ – in columns of figures. Commonly read "fourteen pound(s) eight and two")

Halfpennies and farthings (quarter of a penny) were represented by the appropriate symbol (​14 for farthing, ​12 for halfpenny, or ​34 for three farthings) after the whole pence.

A convention frequently used in retail pricing was to list prices over one pound all in shillings, rather than in pounds and shillings; for example, £4-18-0 would be written as 98/– (£4.90 in decimal currency). This is still seen in shilling categories of Scottish beer, such as 90/– beer.

Sometimes, prices of luxury goods and furniture were expressed by merchants in guineas, although the guinea coin had not been struck since 1799. A guinea was 21 shillings (£1.05 in decimal currency). Professionals such as lawyers[14] and physicians, art dealers, and some others stated their fees in guineas rather than pounds, while, for example, salaries were stated in pounds per annum.[15] Historically, at some auctions, the purchaser would bid and pay in guineas but the seller would receive the same number of pounds; the commission was the same number of shillings. Tattersalls, the main auctioneer of racehorses in the United Kingdom and Ireland, continues this tradition of conducting auctions in guineas at its UK sales (in Ireland, auctions are conducted in euros). The vendor's commission is 5%.[16][17] The word "guineas" is still found in the names of some British horse races, even though their prize funds are now fixed in pounds – such as the 1,000 Guineas and 2,000 Guineas at Newmarket Racecourse.

Colloquial termsEdit

A farthing or ha'penny bit was called a "mag" (slang for "chattering") because they were originally made from copper and made a ringing noise when dropped. The game of "penny pitching" (bouncing pennies against a wall to see how far they would rebound onto the pavement) was called "mag flying".[citation needed]

A threepenny bit (pronounced thrupney bit) was called a "Joey" (see Fourpence below);[citation needed] it was a silver or silver alloy coin from 1845 to 1937 and a 12-sided bronze coin from 1937 to 1971. It was known as a "tickey" in South Africa[18] and Southern Rhodesia.[19] In Australia it was known as a tray (also spelt trey), or a tray bit, from the French "trois" meaning three.[20]

A fourpenny bit was often known as a "groat", from the medieval four-penny silver coin of the same name. It was nicknamed a "Joey", from Joseph Hume, the Radical MP who championed its reintroduction.[citation needed] When the new threepence coin replaced the fourpence coin in circulation in 1845, it took over its nickname.

A sixpenny bit was a "tanner", derived from the Romany word tano, meaning "small" (because it was smaller than a shilling). It was also called a "tester" or "testoon" from the teston, a French coin. In Australia it was called a "Zack".

One shilling was called a "bob" or "thin 'un" (because it was thinner than a sovereign coin).[citation needed] It is known in Australia as a "deener" possibly from 'Dinar' or 'Denarius'.[citation needed]

A two-shilling piece known as a florin (an early attempt at decimalisation, being ​£ 110), was in everyday use. It was referred to as "two bob", a "two-shilling bit", or a "two-bob-bit".

A two-shillings-and-sixpence piece, in use until the introduction of decimal currency, was known as "half a crown" or a "half crown". They were discontinued in 1971 as there was no need for a ​12 12 New Pence coin.

A five-shilling piece was called a crown or a dollar.[12][13]

A ten-shilling note was sometimes known as "half a bar".[citation needed] It was first printed in 1914 by the Treasury during World War One to conserve silver. These early Treasury notes (especially the 1st and 2nd Series from 1914 to 1917) were nicknamed "Bradburys", from the prominent stylized signature of Sir John Bradbury, Permanent Secretary to the Treasury (1913-1919).[citation needed]

A pound was called a "nicker" or "quid". The term "quid" is said to originate from the Latin phrase quid pro quo.[citation needed] A pound coin, or sovereign, was called a "sov" or "thick 'un" (because it was thicker than a shilling). A pound note was called a "bar" or "sheet" (from its rectangular shape) or simply a "note" (e.g., "You owe me 50 notes").[citation needed]

The larger denomination notes (£5, £10, £20, £50, £100, £200, £500, and £1000) printed from the 18th century to 1943 were called "white notes" because they were printed on lightweight white paper with the text in black ink.[21]

In popular cultureEdit

The currency of Lancre, a kingdom in the fictional world of Discworld, is a parody of the £sd system. The currency is the same from the farthing to the shilling, but adds the Crown (worth 12 shillings), Tencrown (worth 10 crowns), Sovereign (worth 12 crowns), and Hedgehog (worth 12 sovereigns). The coins are all rather heavy (weighing from over an ounce to several pounds) and are hard to carry.

The currency of knuts, sickles and galleons in the Harry Potter books is also a parody of the £sd system, with 29 knuts to a sickle and 17 sickles to a galleon. It serves as the currency of the Wizarding World, while pounds are still used by Muggles, the non-magical people.[22][23]

Lysergic acid diethylamide was sometimes called "pounds, shillings and pence" during the 1960s, because of the abbreviation LSD.[24] The English rock group the Pretty Things released a 1966 single titled "£.s.d." that highlighted the double entendre.[25] The Chemical Defence Experimental Establishment called the first field trial with LSD as a chemical weapon "Moneybags" as a pun.[26]

The score of 26 at darts (one dart in each of the top three spaces) was sometimes called "half-a-crown" as late as the 1990s, though this did start to confuse the younger players. 26 is also referred to as "Breakfast", since 2/6 or half a crown was the standard cost for breakfast pre-decimalisation.

See alsoEdit

  • Coins of the pound sterling – the standard circulating coinage of the United Kingdom
  • Irish pound – decimalised on Decimal Day, the Irish Pound was the currency of Ireland until 2002
  • Decimal time – the representation of the time of day using units which are decimally related

ReferencesEdit

  1. ^ C. H. V. Sutherland, English Coinage 600-1900 (1973, ISBN 0-7134-0731-X), p. 10
  2. ^ Hodgkin, Thomas (1906). The history of England … to the Norman conquest. London, New York and Bombay: Longmans, Green, and Co. p. 234.
  3. ^ Walkingame, Francis (1874). "The Tutor's Assistant". The Tutor's Assistant: 96.
  4. ^ Oxford English Dictionary, s.v. 'pound'
  5. ^ Redish, Angela (2010). From the Carolingian Penny to the Classical Gold Standard (PDF). Bimetallism: An Economic and Historical Analysi. Cambridge University Press. ISBN 978-0-521-02893-6. Retrieved 11 November 2010.
  6. ^ Bank of England. "Exchanging withdrawn Bank of England banknotes". Retrieved 16 April 2017.
  7. ^ "Withdrawal of Manx Plastic £1 note". Isle of Man Government. Retrieved 2 July 2018.
  8. ^ "solidus: definition of solidus in Oxford dictionary (British & World English)". Oxford University Press. Archived from the original on 10 June 2014. Retrieved 10 June 2014.
  9. ^ Fowler, Francis George (1917). "long+s"+shilling The concise Oxford dictionary of current English. p. 829.
  10. ^ a b "halfpenny - definition of halfpenny in English from the Oxford dictionary". oxforddictionaries.com.
  11. ^ Schwarz, C. M. (1993), "half", The Chambers Dictionary, p. 755, ISBN 0550102558
  12. ^ a b Partridge, Eric (2 September 2003). The Routledge Dictionary of Historical Slang. Routledge. ISBN 978-1-135-79542-9.
  13. ^ a b "DiCamillo British Money Guide including Amazing Historical Facts". DiCamillo. Retrieved 9 December 2019.
  14. ^ John Palmer (1823). The Attorney and Agents new Table of Costs in the Courts of Kings Bench and Common Pleas, Fifth edition enlarged: to which is added a table of all the stamp duties. p. 461.
  15. ^ Christine Evans-Pughe (12 December 2011). "Faraday - a man of contradictions". Engineering and Technology. Retrieved 3 September 2018.
  16. ^ "Tattersalls February Sale 2019 Catalogue" (PDF). Conditions of Sale, Paragraph 3.2. Tattersalls Limited. p. 14. Retrieved 1 May 2019.
  17. ^ "Guide to Sales (2018 Edition)" (PDF). Tattersalls Limited. Retrieved 1 May 2019.
  18. ^ Hear the Tickey Bottle Tinkle, The Rotarian, June 1954
  19. ^ Southern Rhodesia, Past and Present, Chronicle Stationery and Book Store, 1945
  20. ^ "Slang Terms for Money". The Australian Coin Collecting Blog. Retrieved 24 August 2017.
  21. ^ Bank of England (2019). "Withdrawn banknotes". Retrieved 16 May 2019.
  22. ^ "Wizard Currency". The Harry Potter Lexicon. 24 February 2018.
  23. ^ Harry Potter Collectibles. 7 March 2000. ISBN 9781585980734 – via Google Books.
  24. ^ Dickson, Paul (1998). Slang: The Authoritative Topic-By-Topic Dictionary of American Lingoes from All Walks of Life. Pocket Books. p. 134. ISBN 0-671-54920-0.
  25. ^ http://www.theprettythings.com/disco.html The Pretty Things discography
  26. ^ Andy Roberts (30 September 2008). Albion Dreaming: A popular history of LSD in Britain (Revised Edition with a new foreword by Dr. Sue Blackmore). Marshall Cavendish International Asia Pte Ltd. p. 52. ISBN 978-981-4328-97-5.

External linksEdit