APA (7 वां संस्करण) प्रशस्ति पत्र
Dunlap, T. R. (2011). In the field, among the feathered: A history of birders and their guides. Oxford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Dunlap, Thomas R. In the Field, Among the Feathered: A History of Birders and Their Guides. Oxford ; New York: Oxford University Press, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Dunlap, Thomas R. In the Field, Among the Feathered: A History of Birders and Their Guides. Oxford University Press, 2011.
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