Wilkins. When We Were Birds. University of Arkansas Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilkins. When We Were Birds. University of Arkansas Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWilkins. When We Were Birds. University of Arkansas Press.
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