The grey-headed honeyeater was previously placed in the genus Lichenostomus but was moved to Ptilotula after a molecular phylogenetic analysis published in 2011 showed that the original genus was polyphyletic.
- BirdLife International (2012). "Lichenostomus keartlandi". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
- Nyári, Á.S.; Joseph, L. (2011). "Systematic dismantlement of Lichenostomus improves the basis for understanding relationships within the honeyeaters (Meliphagidae) and historical development of Australo–Papuan bird communities". Emu. 111: 202–211. doi:10.1071/mu10047.
- Gill, Frank; Donsker, David (eds.). "Honeyeaters". World Bird List Version 6.1. International Ornithologists' Union. Retrieved 28 January 2016.
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