Tubbs, S. L. (1998). A systems approach to small group interaction.: Edsition 6 (6th ed.). Boston: McGraw-Hill.
Trích dẫn kiểu ChicagoTubbs, Stewart L. A Systems Approach to Small Group Interaction.: Edsition 6. 6th ed. Boston: McGraw-Hill, 1998.
Deismireacht MLATubbs, Stewart L. A Systems Approach to Small Group Interaction.: Edsition 6. 6th ed. Boston: McGraw-Hill, 1998.
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