Cita APA (7a ed.)

Wolberg, L. R. (19). Group therapy: An overview. Stratton intercontinental.

Cita Chicago Style (17a ed.)

Wolberg, Lewis R. Group Therapy: An Overview. New York: Stratton intercontinental, 19.

Cita MLA (9a ed.)

Wolberg, Lewis R. Group Therapy: An Overview. Stratton intercontinental, 19.