Cita APA (7th ed.)

Johnson, D. W., & Johnson, F. P. (2003). Joining together: Group theory and group skills (8th ed.). Allyn and Bacon.

Cita Chicago (17th ed.)

Johnson, David W., i Frank Pierce Johnson. Joining Together: Group Theory and Group Skills. 8th ed. Boston: Allyn and Bacon, 2003.

Cita MLA (9th ed.)

Johnson, David W., i Frank Pierce Johnson. Joining Together: Group Theory and Group Skills. 8th ed. Allyn and Bacon, 2003.