Manning, R. E., Diamant, R., Mitchell, N., & Harmon, D. (2016). A thinking person's guide to America's national parks (First edition.). George Braziller Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रManning, Robert E., Rolf Diamant, Nora Mitchell, और David Harmon. A Thinking Person's Guide to America's National Parks. First edition. New York: George Braziller Publishers, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रManning, Robert E., et al. A Thinking Person's Guide to America's National Parks. First edition. George Braziller Publishers, 2016.
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