Cita APA (7th ed.)

Friedman, W. H. (1989). Practical group therapy: A guide for clinicians. Jossey-Bass Publishers.

Cita Chicago (17th ed.)

Friedman, William H. Practical Group Therapy: A Guide for Clinicians. San Francisco: Jossey-Bass Publishers, 1989.

Cita MLA (9th ed.)

Friedman, William H. Practical Group Therapy: A Guide for Clinicians. Jossey-Bass Publishers, 1989.