APA (7e ed.) Bronvermelding
Johnson, D. W., & Johnson, F. P. (1991). Joining together: Group theory and group skills (4th ed.). Prentice-Hall.
Chicago (17e ed.) Bronvermelding
Johnson, David W., en Frank P. Johnson. Joining Together: Group Theory and Group Skills. 4th ed. Englewood Cliffs, N.J.: Prentice-Hall, 1991.
MLA (9e ed.) Bronvermelding
Johnson, David W., en Frank P. Johnson. Joining Together: Group Theory and Group Skills. 4th ed. Prentice-Hall, 1991.
Let op: Deze citaties zijn niet altijd 100% accuraat.