Citazione Stile APA (7a Edizione)

Johnson, D. W. (1987). Joining together: Group theory and group skills (3rd ed.). Prentice-Hall.

Citazione stile Chigago Style (17a edizione)

Johnson, David W. Joining Together: Group Theory and Group Skills. 3rd ed. Englewood Cliffs, N.J: Prentice-Hall, 1987.

Citatione MLA (9a ed.)

Johnson, David W. Joining Together: Group Theory and Group Skills. 3rd ed. Prentice-Hall, 1987.