APA (7th ed.) Citation

Simpson, G. G. (1965). Life: An introduction to biology (2nd ed.). Harcourt.

Chicago Style (17th ed.) Citation

Simpson, George Gaylord. Life: An Introduction to Biology. 2nd ed. New York: Harcourt, 1965.

MLA (9th ed.) Citation

Simpson, George Gaylord. Life: An Introduction to Biology. 2nd ed. Harcourt, 1965.