APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.