APA

Sager C. J., Kaplan H. S., . (1972). Progress in group and family therapy. New York: Brunner/Mazel.

Chicago

Sager Clifford J, Kaplan Helen Singer, . 1972. Progress in group and family therapy. New York: Brunner/Mazel.

Harvard

Sager C. J., Kaplan H. S., . (1972). Progress in group and family therapy. New York: Brunner/Mazel.

MLA

Sager Clifford J, Kaplan Helen Singer, . Progress in group and family therapy. New York: Brunner/Mazel. 1972.