APA (7th ed.) Citation

Keeton, W. T., Gould, J. L., & Gould, C. G. (1986). Biological science (4th ed.). Norton.

Chicago Style (17th ed.) Citation

Keeton, William T., James L. Gould, and Carol Grant Gould. Biological Science. 4th ed. New York: Norton, 1986.

MLA (9th ed.) Citation

Keeton, William T., et al. Biological Science. 4th ed. Norton, 1986.