Unwin, M., Tipling, D., & Angell, T. (2016). The enigma of the owl: An illustrated natural history. Yale University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnwin, Mike, David Tipling, और Tony Angell. The Enigma of the Owl: An Illustrated Natural History. New Haven, CT ; London: Yale University Press, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnwin, Mike, et al. The Enigma of the Owl: An Illustrated Natural History. Yale University Press, 2016.
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