APA (7th ed.) Citation

Keeton, W. T., Gould, J. L., & Gould, C. G. (1993). Biological science (5th ed.). Norton.

Chicago Style (17th ed.) Citation

Keeton, William T., James L. Gould, and Carol Grant Gould. Biological Science. 5th ed. New York: Norton, 1993.

MLA (9th ed.) Citation

Keeton, William T., et al. Biological Science. 5th ed. Norton, 1993.