Não informado. (1940). Wildlife research bulletin. U.S. Fish and Wildlife Service.
Chicago (17e ed.) BronvermeldingNão informado. Wildlife Research Bulletin. Washington: U.S. Fish and Wildlife Service, 1940.
MLA (8e ed.) BronvermeldingNão informado. Wildlife Research Bulletin. U.S. Fish and Wildlife Service, 1940.
Let op: Deze citaties zijn niet altijd 100% accuraat.