APA Style

Whitaker, C, A. (1981). The roots of psychotherapy / by Carl A. Whitaker and Thomas P. Malone. . New York: Brunner/Mazel, cop.

MLA Style

Whitaker, Carl, A.. "The roots of psychotherapy / by Carl A. Whitaker and Thomas P. Malone.". New York: Brunner/Mazel, cop, 1981. Text.