[1] Must be substituted. {{subst:User:Dcmacnut/NDPO}} is a shortcut that will insert a reference in articles using {{cite book}} to North Dakota Post Offices by Alan H. Patera and John S. Gallagher.
^Patera, Alan H. (1982). North Dakota Post Offices, 1850-1982. Burtonsville, Maryland: The Depot. OCLC09763647. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
