APA (7th ed.) Citation

Gould, J. L., & Keeton, W. T. (1996). Biological science (6th ed.). W.W. Norton.

Chicago Style (17th ed.) Citation

Gould, James L., and William T. Keeton. Biological Science. 6th ed. New York: W.W. Norton, 1996.

MLA (9th ed.) Citation

Gould, James L., and William T. Keeton. Biological Science. 6th ed. W.W. Norton, 1996.