APA (7th ed.) Citation

United States. National Park Service & Lee, W. T. (1917). Geologic story of Rocky Mountain National Park, Colo. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. National Park Service and Willis T. Lee. Geologic Story of Rocky Mountain National Park, Colo. Washington: U.S. GPO, 1917.

MLA (9th ed.) Citation

United States. National Park Service and Willis T. Lee. Geologic Story of Rocky Mountain National Park, Colo. U.S. GPO, 1917.

Warning: These citations may not always be 100% accurate.