APA (7e ed.) Bronvermelding

Não informado. (1961). Massachusetts audubon newsletter. Massachusetts Audubon Society.

Chicago (17e ed.) Bronvermelding

Não informado. Massachusetts Audubon Newsletter. South Lincoln, Mass: Massachusetts Audubon Society, 1961.

MLA (8e ed.) Bronvermelding

Não informado. Massachusetts Audubon Newsletter. Massachusetts Audubon Society, 1961.

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