APA (7e ed.) Bronvermelding

Não informado. (2003). North American Birds. American Birding Association.

Chicago (17e ed.) Bronvermelding

Não informado. North American Birds. Colorado Springs, Colo: American Birding Association, 2003.

MLA (8e ed.) Bronvermelding

Não informado. North American Birds. American Birding Association, 2003.

Let op: Deze citaties zijn niet altijd 100% accuraat.