1. Garnett, S. and Bredl, R. (1985). Birds in the vicinity of Edward River Settlement. Part I. Introduction, methods, study area, list of non-passerines. Sunbird. 15: 6-23.
2. Baker, K. (1993). Identification Guide to European Non-passerines. BTO Guide 24. British Trust for Ornithology, Thetford, United Kingdom.
3. Pyle, P. (2008). Identification Guide to North American Birds, Part II: Anatidae to Alcidae. Slate Creek Press, Point Reyes Station, California, USA.
4. Dwight, Jr., J. (1901). The sequence of molts and plumages of the Laridae (gulls and terns). Auk 18:49-63.
5. Cramp, S. (1985). The Birds of the Western Palearctic. Volume 4. Terns to Woodpeckers. Oxford University Press, Oxford, United Kingdom.