Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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