Ehlers, S. M., & Schaeffer, P. P. (1990). Proceedings of the National Audubon Society's Symposium on the birds of Mexico their ecology and conservation. California: National Audubon Society.
Chicago Style CitationEhlers, Sharyn Marie,, and Philip P. Schaeffer. Proceedings of the National Audubon Society's Symposium On the Birds of Mexico Their Ecology and Conservation. California: National Audubon Society, 1990.
MLA CitationEhlers, Sharyn Marie,, and Philip P. Schaeffer. Proceedings of the National Audubon Society's Symposium On the Birds of Mexico Their Ecology and Conservation. California: National Audubon Society, 1990.
Warning: These citations may not always be 100% accurate.