Cita APA

Kortright, F. H. (1943). The ducks, geese and swans of North American: A vade mecum. Washington, D. C.: American Wildlife Institute.

Citación estilo Chicago

Kortright, Francis H. The Ducks, Geese and Swans of North American: A Vade Mecum. Washington, D. C.: American Wildlife Institute, 1943.

Cita MLA

Kortright, Francis H. The Ducks, Geese and Swans of North American: A Vade Mecum. Washington, D. C.: American Wildlife Institute, 1943.