APA (7e ed.) Bronvermelding

Johnson, D. W., & Johnson, F. P. (2000). Joining together: Group theory and group skills (7th ed.). Allyn and Bacon.

Chicago (17e ed.) Bronvermelding

Johnson, David W., en Frank P. Johnson. Joining Together: Group Theory and Group Skills. 7th ed. Boston: Allyn and Bacon, 2000.

MLA (9e ed.) Bronvermelding

Johnson, David W., en Frank P. Johnson. Joining Together: Group Theory and Group Skills. 7th ed. Allyn and Bacon, 2000.