Cita APA (7a ed.)

Berne, E. (1966). Principles of group treatment. Grove Press, Inc.

Cita Chicago Style (17a ed.)

Berne, Eric. Principles of Group Treatment. New York: Grove Press, Inc, 1966.

Cita MLA (9a ed.)

Berne, Eric. Principles of Group Treatment. Grove Press, Inc, 1966.