Peterson, R. T., DiGiorgio, M., Lehman, P. E., Pyle, P., & Rosche, L. (2020). Peterson field guide to birds of western North America (Fifth edition.). Houghton Mifflin Harcourt.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPeterson, Roger Tory, Michael DiGiorgio, Paul E. Lehman, Peter Pyle, और Larry Rosche. Peterson Field Guide to Birds of Western North America. Fifth edition. Boston: Houghton Mifflin Harcourt, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPeterson, Roger Tory, et al. Peterson Field Guide to Birds of Western North America. Fifth edition. Houghton Mifflin Harcourt, 2020.
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