APA (7th ed.) Citation

Day, A. M. (1949). North American waterfowl. Stackpole and Heck.

Chicago Style (17th ed.) Citation

Day, Albert M. North American Waterfowl. New York: Stackpole and Heck, 1949.

MLA (9th ed.) Citation

Day, Albert M. North American Waterfowl. Stackpole and Heck, 1949.