Cita APA (7a ed.)

Liberman, R. P., Wheeler, E. G., De Visser, L. A. J. M., Kuehnel, J. M., & Kuehnel, T. G. (1980). Handbook of marital therapy: A positive approach to helping troubled relationships. Plenum Press.

Cita Chicago Style (17a ed.)

Liberman, Robert Paul, Eugenie G. Wheeler, Louis A. J. M. De Visser, Julie M. Kuehnel, y Timothy G. Kuehnel. Handbook of Marital Therapy: A Positive Approach to Helping Troubled Relationships. New York ; London: Plenum Press, 1980.

Cita MLA (9a ed.)

Liberman, Robert Paul, et al. Handbook of Marital Therapy: A Positive Approach to Helping Troubled Relationships. Plenum Press, 1980.