APA (7th ed.) Citation

Sager, C. J. (1972). Progress in group and family therapy (4. printing.). Brunner/Mazel.

Chicago Style (17th ed.) Citation

Sager, Clifford J. Progress in Group and Family Therapy. 4. printing. New York ; London: Brunner/Mazel, 1972.

MLA (9th ed.) Citation

Sager, Clifford J. Progress in Group and Family Therapy. 4. printing. Brunner/Mazel, 1972.