APA (7th ed.) Citation

Sober, E., & Wilson, D. S. (1998). Unto others: The evolution and psychology of unselfish behavior. Harvard University Press.

Chicago Style (17th ed.) Citation

Sober, Elliot, and David Sloan Wilson. Unto Others: The Evolution and Psychology of Unselfish Behavior. Cambridge, Massachusetts: Harvard University Press, 1998.

MLA (8th ed.) Citation

Sober, Elliot, and David Sloan Wilson. Unto Others: The Evolution and Psychology of Unselfish Behavior. Harvard University Press, 1998.