Cita APA (7th ed.)

Diedrich, R. C., & Dye, H. (1972). Group procedures: Purposes, processes, and outcomes. Houghton Mifflin.

Cita Chicago (17th ed.)

Diedrich, Richard C., i H.Allan Dye. Group Procedures: Purposes, Processes, and Outcomes. Boston: Houghton Mifflin, 1972.

Cita MLA (9th ed.)

Diedrich, Richard C., i H.Allan Dye. Group Procedures: Purposes, Processes, and Outcomes. Houghton Mifflin, 1972.