APA (7th ed.) Citation

Caplan, A. L., Darwin, C., Marx, K., Freud, S., & Jennings, B. (1984). Darwin, Marx, and Freud: Their influence on moral theory. Plenum Press.

Chicago Style (17th ed.) Citation

Caplan, Arthur L., Charles Darwin, Karl Marx, Sigmund Freud, and Bruce Jennings. Darwin, Marx, and Freud: Their Influence on Moral Theory. New York, NY [u.a.]: Plenum Press, 1984.

MLA (8th ed.) Citation

Caplan, Arthur L., et al. Darwin, Marx, and Freud: Their Influence on Moral Theory. Plenum Press, 1984.