Irving, J. (1997). Setting free the bears (1st Ballantine Books trade ed.). Ballantine Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIrving, John. Setting Free the Bears. 1st Ballantine Books trade ed. New York: Ballantine Books, 1997.
एमएलए (8वां संस्करण) प्रशस्ति पत्रIrving, John. Setting Free the Bears. 1st Ballantine Books trade ed. Ballantine Books, 1997.
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