APA (7 वां संस्करण) प्रशस्ति पत्र
Hopper, E. (2003). Traumatic experience in the unconscious life of groups: The fourth basic assumption. Jessica Kingsley Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Hopper, Earl. Traumatic Experience in the Unconscious Life of Groups: The Fourth Basic Assumption. Philadelphia, PA: Jessica Kingsley Publishers, 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Hopper, Earl. Traumatic Experience in the Unconscious Life of Groups: The Fourth Basic Assumption. Jessica Kingsley Publishers, 2003.
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