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.

Hoff, Emily, Maygen Keller, and Jillian Barthold. Scenic Science of the National Parks: An Explorer's Guide to Wildlife, Geology, and Botany. First edition. California: Ten Speed Press, 2020.

Hoff, Emily, et al. Scenic Science of the National Parks: An Explorer's Guide to Wildlife, Geology, and Botany. First edition. Ten Speed Press, 2020.