APA (7e ed.) Bronvermelding

Jacobs. E & Schimmel, C. J. (2016). Group Counseling: Strategies and Skills (octava edición.). Cengage Learning, Inc.

Chicago (17e ed.) Bronvermelding

Jacobs. E en Christine J. Schimmel. Group Counseling: Strategies and Skills. octava edición. Boston, Massachusetts: Cengage Learning, Inc, 2016.

MLA (9e ed.) Bronvermelding

Jacobs. E en Christine J. Schimmel. Group Counseling: Strategies and Skills. octava edición. Cengage Learning, Inc, 2016.