Arch under Citadel Rock, Colorado Divide. El Paso County, Colorado.

Chicago citation style
Department of the Interior. General Land Office. U.S. Geological and Geographic Survey of the Territories. (1874 - 6/30/1879). Arch under Citadel Rock, Colorado Divide. El Paso County, Colorado.. 1874. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/517071. (Accessed December 15, 2018.)
APA citation style
Department of the Interior. General Land Office. U.S. Geological and Geographic Survey of the Territories. (1874 - 6/30/1879), (1874) Arch under Citadel Rock, Colorado Divide. El Paso County, Colorado.. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/517071
MLA citation style
Department of the Interior. General Land Office. U.S. Geological and Geographic Survey of the Territories. (1874 - 6/30/1879). Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/517071>.
Note: These citations are programmatically generated and may be incomplete.