APA (7th ed.) Citation

Harris, D. V. (1978). The geologic story of the national parks and monuments (2nd ed.). Colorado State University Foundation Press.

Chicago Style (17th ed.) Citation

Harris, David V. The Geologic Story of the National Parks and Monuments. 2nd ed. Fort Collins: Colorado State University Foundation Press, 1978.

MLA (9th ed.) Citation

Harris, David V. The Geologic Story of the National Parks and Monuments. 2nd ed. Colorado State University Foundation Press, 1978.