Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp. 246, 167. ISBN978-1-4081-2501-4.
Carboneras, C. (1992). "Family Anatidae (Ducks, Geese and Swans)". In del Hoyo, J.; Elliott, A.; Sargatal, J. (eds.). Handbook of the Birds of the World. Vol. 1: Ostrich to Ducks. Barcelona, Spain: Lynx Edicions. pp. 536–628 [625]. ISBN84-87334-10-5.