APA (7th ed.) Citation

Simpson, G. G. (1928). American Eocene didelphids.

Chicago Style (17th ed.) Citation

Simpson, George Gaylord. American Eocene Didelphids. New York, N.Y, 1928.

MLA (9th ed.) Citation

Simpson, George Gaylord. American Eocene Didelphids. 1928.

Warning: These citations may not always be 100% accurate.