APA-Zitierstil (7. Ausg.)

Berg, R. C., & Landreth, G. L. (1990). Group counseling: Concepts and procedures. Accelerated Development Inc.

Chicago-Zitierstil (17. Ausg.)

Berg, Robert C., und Garry L. Landreth. Group Counseling: Concepts and Procedures. Muncie, India: Accelerated Development Inc, 1990.

MLA-Zitierstil (9. Ausg.)

Berg, Robert C., und Garry L. Landreth. Group Counseling: Concepts and Procedures. Accelerated Development Inc, 1990.