Cita APA

Berg, R. C., Landreth, G. L., & Fall, K. A. (2006). Group counseling: Concepts and procedures (4th ed.). Routledge.

Citación estilo Chicago

Berg, Robert C., Garry L. Landreth, and Kevin A. Fall. Group Counseling: Concepts and Procedures. 4th ed. New York: Routledge, 2006.

Cita MLA

Berg, Robert C., et al. Group Counseling: Concepts and Procedures. 4th ed. Routledge, 2006.