APA (7th ed.) Citation

Gould, J. L., & Gould, C. G. (1989). Sexual selection. Scientific American Library.

Chicago Style (17th ed.) Citation

Gould, James L., and Carol Grant Gould. Sexual Selection. New York: Scientific American Library, 1989.

MLA (9th ed.) Citation

Gould, James L., and Carol Grant Gould. Sexual Selection. Scientific American Library, 1989.