Cita APA (7th ed.)

Johnson, D. W., & Johnson, F. P. (1994). Joining together: Group theory and group skills (5th ed.). Allyn and Bacon.

Cita Chicago (17th ed.)

Johnson, David W., i Frank P. Johnson. Joining Together: Group Theory and Group Skills. 5th ed. Boston: Allyn and Bacon, 1994.

Cita MLA (9th ed.)

Johnson, David W., i Frank P. Johnson. Joining Together: Group Theory and Group Skills. 5th ed. Allyn and Bacon, 1994.