Audubon Society of Portland, Davis, J., Pugh, E., Ward, J., & Ward, W. (1988). Familiar bird songs of the Northwest. Portland Audubon Society.
Style de citation Chicago (17e éd.)Audubon Society of Portland, James Davis, Eleanor Pugh, Jean Ward, et William Ward. Familiar Bird Songs of the Northwest. Portland, Or.: Portland Audubon Society, 1988.
Style de citation MLA (8e éd.)Audubon Society of Portland, et al. Familiar Bird Songs of the Northwest. Portland Audubon Society, 1988.
Attention : ces citations peuvent ne pas être correctes à 100%.