Citazione Stile APA (7a Edizione)

Johnson, D. W., & Johnson, F. P. (2006). Joining together: Group theory and group skills (9th ed.). Pearson Education.

Citazione stile Chigago Style (17a edizione)

Johnson, David W., e Frank P. Johnson. Joining Together: Group Theory and Group Skills. 9th ed. Upper Saddle River, N.J: Pearson Education, 2006.

Citatione MLA (9a ed.)

Johnson, David W., e Frank P. Johnson. Joining Together: Group Theory and Group Skills. 9th ed. Pearson Education, 2006.