Johnson, D. W., & Johnson, F. P. (1987). Joining together: Group theory and group skills. Prentice-Hall International.
Chicago Style (17. basım) AtıfJohnson, David W., ve Frank Pierce Johnson. Joining Together: Group Theory and Group Skills. London: Prentice-Hall International, 1987.
MLA (9th ed.) AtıfJohnson, David W., ve Frank Pierce Johnson. Joining Together: Group Theory and Group Skills. Prentice-Hall International, 1987.
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