Johnson, D. W., & Johnson, F. P. (2003). Joining together: Group theory and group skills (8th ed.). Allyn and Bacon.
Citace podle Chicago (17th ed.)Johnson, David W., a Frank Pierce Johnson. Joining Together: Group Theory and Group Skills. 8th ed. Boston: Allyn and Bacon, 2003.
Citace podle MLA (9th ed.)Johnson, David W., a Frank Pierce Johnson. Joining Together: Group Theory and Group Skills. 8th ed. Allyn and Bacon, 2003.
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