Tubbs, S. L. (1998). A system approach to small group interaction (6th ed.). McGraw Hill.
Chicago-čujuhus (17. p.)Tubbs, Stewart L. A System Approach to Small Group Interaction. 6th ed. Boston: McGraw Hill, 1998.
MLA-čujuhus (9. p.)Tubbs, Stewart L. A System Approach to Small Group Interaction. 6th ed. McGraw Hill, 1998.
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