APA (7 वां संस्करण) प्रशस्ति पत्र
Ringer, T. M. (2002). Group action: The dynamics of groups in therapeutic, educational and corporate settings. Jessica Kingsley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Ringer, T. Martin. Group Action: The Dynamics of Groups in Therapeutic, Educational and Corporate Settings. London: Jessica Kingsley, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Ringer, T. Martin. Group Action: The Dynamics of Groups in Therapeutic, Educational and Corporate Settings. Jessica Kingsley, 2002.
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