Dyfyniad APA
Johnson, D. W., & Johnson, F. P. (2002). Joining together: Group theory and group skills (8th.ed.). Pearson Education.
Dyfyniad Arddull Chicago
Johnson, David W., and Frank P. Johnson. Joining Together: Group Theory and Group Skills. 8th.ed. Boston: Pearson Education, 2002.
Dyfyniad MLA
Johnson, David W., and Frank P. Johnson. Joining Together: Group Theory and Group Skills. 8th.ed. Pearson Education, 2002.
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