Tubbs, S. L. (1984). A systems approach to small group interaction (2nd ed.). Addison-Wesley Pub.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTubbs, Stewart L. A Systems Approach to Small Group Interaction. 2nd ed. Reading, Mass: Addison-Wesley Pub, 1984.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTubbs, Stewart L. A Systems Approach to Small Group Interaction. 2nd ed. Addison-Wesley Pub, 1984.
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