No 10: Expedition of 1872: The mouth of Kanab Creek. The beds of the Colorado River and its tributary here lie in gorges cut by the running water to the depth of about 3,500 feet below the general surface of the country. The highest point seen in the picture is 2,500 feet above the water, and the walls are here too steep to be scaled.

Chicago citation style
War Department. Office of the Chief of Engineers. Office of U.S. Geographical Surveys West of the 100th Meridian. 1871-1879. No 10: Expedition of 1872: The mouth of Kanab Creek. The beds of the Colorado River and its tributary here lie in gorges cut by the running water to the depth of about 3,500 feet below the general surface of the country. The highest point seen in the picture is 2,500 feet above the water, and the walls are here too steep to be scaled.. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/295369. (Accessed October 17, 2018.)
APA citation style
War Department. Office of the Chief of Engineers. Office of U.S. Geographical Surveys West of the 100th Meridian. 1871-1879, No 10: Expedition of 1872: The mouth of Kanab Creek. The beds of the Colorado River and its tributary here lie in gorges cut by the running water to the depth of about 3,500 feet below the general surface of the country. The highest point seen in the picture is 2,500 feet above the water, and the walls are here too steep to be scaled.. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/295369
MLA citation style
War Department. Office of the Chief of Engineers. Office of U.S. Geographical Surveys West of the 100th Meridian. 1871-1879. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/295369>.
Note: These citations are programmatically generated and may be incomplete.