APA (7th ed.) Citation

Whaley, W. G., Breland, O. P., Heimsch, C., Phelps, A., & Rabideau, G. S. (1954). Principles of biology. Harper.

Chicago Style (17th ed.) Citation

Whaley, William Gordon, Osmond P. Breland, Charles Heimsch, Austin Phelps, and Gleen S. Rabideau. Principles of Biology. New York: Harper, 1954.

MLA (9th ed.) Citation

Whaley, William Gordon, et al. Principles of Biology. Harper, 1954.