Hoff, E., Keller, M., & Barthold, J. (2020). Scenic science of the national parks: An explorer's guide to wildlife, geology, and botany (First edition.). Ten Speed Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHoff, Emily, Maygen Keller, और Jillian Barthold. Scenic Science of the National Parks: An Explorer's Guide to Wildlife, Geology, and Botany. First edition. California: Ten Speed Press, 2020.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHoff, Emily, et al. Scenic Science of the National Parks: An Explorer's Guide to Wildlife, Geology, and Botany. First edition. Ten Speed Press, 2020.
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