Diedrich, R. C., & Dye, H. (1972). Group procedures: Purposes, processes, and outcomes. Houghton Mifflin.
Chicago Style (17th ed.) ZitazioaDiedrich, Richard C., eta H.Allan Dye. Group Procedures: Purposes, Processes, and Outcomes. Boston: Houghton Mifflin, 1972.
MLA (9th ed.) ZitazioaDiedrich, Richard C., eta H.Allan Dye. Group Procedures: Purposes, Processes, and Outcomes. Houghton Mifflin, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.