Cita APA (7a ed.)

Dryden, W., & Trower, P. (1988). Developments in cognitive psychotherapy. Sage.

Cita Chicago Style (17a ed.)

Dryden, Windy, y Peter Trower. Developments in Cognitive Psychotherapy. London [etc.]: Sage, 1988.

Cita MLA (9a ed.)

Dryden, Windy, y Peter Trower. Developments in Cognitive Psychotherapy. Sage, 1988.