APA aipamena

Johnson, D. W., & Johnson, F. P. (1991). Joining together: Group theory and group skills (4th ed.). Prentice-Hall.

Chicago Style aipamena

Johnson, David W., and Frank P. Johnson. Joining Together: Group Theory and Group Skills. 4th ed. New Jersey: Prentice-Hall, 1991.

MLA aipamena

Johnson, David W., and Frank P. Johnson. Joining Together: Group Theory and Group Skills. 4th ed. Prentice-Hall, 1991.