Citazione Stile APA (7a Edizione)

Diedrich, R. C. (1972). Group procedures: purposes, processes, and outcomes: Selected readings for the counselor. Houghton Mifflin Company.

Citazione stile Chigago Style (17a edizione)

Diedrich, Richard C. Group Procedures: Purposes, Processes, and Outcomes: Selected Readings for the Counselor. Boston: Houghton Mifflin Company, 1972.

Citatione MLA (9a ed.)

Diedrich, Richard C. Group Procedures: Purposes, Processes, and Outcomes: Selected Readings for the Counselor. Houghton Mifflin Company, 1972.