Cita APA (7th ed.)

Johnson, D. W., & Johnson, F. P. (1997). Joining together: Group theory and group skills (6th ed.). Allyn and Bacon.

Cita Chicago (17th ed.)

Johnson, David W., i Frank P. Johnson. Joining Together: Group Theory and Group Skills. 6th ed. Boston, Mass.: Allyn and Bacon, 1997.

Cita MLA (8th ed.)

Johnson, David W., i Frank P. Johnson. Joining Together: Group Theory and Group Skills. 6th ed. Allyn and Bacon, 1997.