Floyd, T. (2025). Field guide to the birds of the United States and Canada (Eighth edition.). National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFloyd, Ted. Field Guide to the Birds of the United States and Canada. Eighth edition. Washington, D.C.: National Geographic, 2025.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFloyd, Ted. Field Guide to the Birds of the United States and Canada. Eighth edition. National Geographic, 2025.
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