"Looking into location of high level concrete mixing plant. Aggregate hoppers for plant seen in background. Extension of U.S. Construction Railroad seen against cliff, structure at right is stationary headtower for cableway installation."

Chicago citation style
Department of the Interior. Bureau of Reclamation. Engineering and Research Center. 5/18/1981-3/4/1988. "Looking into location of high level concrete mixing plant. Aggregate hoppers for plant seen in background. Extension of U.S. Construction Railroad seen against cliff, structure at right is stationary headtower for cableway installation.". 1932-12-31. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/293786. (Accessed September 23, 2018.)
APA citation style
Department of the Interior. Bureau of Reclamation. Engineering and Research Center. 5/18/1981-3/4/1988, (1932-12-31) "Looking into location of high level concrete mixing plant. Aggregate hoppers for plant seen in background. Extension of U.S. Construction Railroad seen against cliff, structure at right is stationary headtower for cableway installation.". Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/293786
MLA citation style
Department of the Interior. Bureau of Reclamation. Engineering and Research Center. 5/18/1981-3/4/1988. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/293786>.
Note: These citations are programmatically generated and may be incomplete.