Não informado. (2001). Yearbook of the Massachusetts Audubon Society. Massachusetts Audubon Society.
Style de citation Chicago (17e éd.)Não informado. Yearbook of the Massachusetts Audubon Society. Lincoln, Mass: Massachusetts Audubon Society, 2001.
Style de citation MLA (8e éd.)Não informado. Yearbook of the Massachusetts Audubon Society. Massachusetts Audubon Society, 2001.
Attention : ces citations peuvent ne pas être correctes à 100%.