APA (7e ed.) Bronvermelding

Garvin, C. D. (1997). Contemporary group work (3rd ed.). Allyn and Bacon.

Chicago (17e ed.) Bronvermelding

Garvin, Charles D. Contemporary Group Work. 3rd ed. Boston, IL: Allyn and Bacon, 1997.

MLA (9e ed.) Bronvermelding

Garvin, Charles D. Contemporary Group Work. 3rd ed. Allyn and Bacon, 1997.