Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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