"Roosevelt Dam. General view of north spillway looking downstream and toward north abutment."

Chicago citation style
Department of the Interior. Bureau of Reclamation. Engineering and Research Center. 5/18/1981-3/4/1988. "Roosevelt Dam. General view of north spillway looking downstream and toward north abutment.". 1936-05-26. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/294549. (Accessed September 22, 2018.)
APA citation style
Department of the Interior. Bureau of Reclamation. Engineering and Research Center. 5/18/1981-3/4/1988, (1936-05-26) "Roosevelt Dam. General view of north spillway looking downstream and toward north abutment.". Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/294549
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/294549>.
Note: These citations are programmatically generated and may be incomplete.