Floyd, T., & Schmitt, N. J. (2019). How to know the birds: The art & adventure of birding. National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFloyd, Ted, और N. John Schmitt. How to Know the Birds: The Art & Adventure of Birding. Washington, D.C.: National Geographic, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFloyd, Ted, और N. John Schmitt. How to Know the Birds: The Art & Adventure of Birding. National Geographic, 2019.
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