NEW YORK U.S.A
Bryce Canyon, National Park Service. (2016, April 13). Natural Bridge - Bryce Canyon National Park (U.S. National Park Service).
United States Geological Survey (USGS). (n.d.). Geology of Bryce Canyon National Park.
National Park Service. Bryce Canyon: The story in the rocks.
William E. Bowers & United States Department of the Interior. (1972). The Canaan Peak, Pine Hollow, and Wasatch Formations in the Table Cliff Region, Garfield County, Utah. United States Geologic Survey (USGS).