MLA

Thibaut, John W, and Harold H Kelley. The Social Psychology of Groups. New York: Wiley, 1959.

APA

Thibaut, J. W, & Kelley, H. H. (1959). The social psychology of groups. New York: Wiley.

Chicago

Thibaut, John W., and Harold H Kelley. The Social Psychology of Groups. New York: Wiley, 1959.