Sibley, D. (2016). Sibley birds west: Field guide to birds of western North America (Second edition.). Alfred A. Knopf.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSibley, David. Sibley Birds West: Field Guide to Birds of Western North America. Second edition. New York: Alfred A. Knopf, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSibley, David. Sibley Birds West: Field Guide to Birds of Western North America. Second edition. Alfred A. Knopf, 2016.
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