Birney, B. G. (2015). Imagination according to Humphrey. G. P. Putnam's Sons, an imprint of Penguin Group (USA).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBirney, Betty G. Imagination According to Humphrey. New York, NY: G. P. Putnam's Sons, an imprint of Penguin Group (USA), 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBirney, Betty G. Imagination According to Humphrey. G. P. Putnam's Sons, an imprint of Penguin Group (USA), 2015.
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