Não informado. (2003). North American Birds. American Birding Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. North American Birds. Colorado Springs, Colo: American Birding Association, 2003.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. North American Birds. American Birding Association, 2003.
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