True, D. (1993). Hummingbirds of North America: Attracting, feeding, and photographing. University of New Mexico Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTrue, Dan. Hummingbirds of North America: Attracting, Feeding, and Photographing. Albuquerque: University of New Mexico Press, 1993.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTrue, Dan. Hummingbirds of North America: Attracting, Feeding, and Photographing. University of New Mexico Press, 1993.
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