APA (7th ed.) Citation

Hunt, M. M., & Chappell, W. (1959). The natural history of love. A. A. Knopf.

Chicago Style (17th ed.) Citation

Hunt, Morton M., and Warren Chappell. The Natural History of Love. New York: A. A. Knopf, 1959.

MLA (8th ed.) Citation

Hunt, Morton M., and Warren Chappell. The Natural History of Love. A. A. Knopf, 1959.