Photograph with caption "Mississippi River Lock #10. 'P.W.A.' Contract #W741, ENG 1410. Mono. 20 'L' showing pile foundation and reinforcing steel. Looking southwest."

Chicago citation style
War Department. Office of the Chief of Engineers. St. Paul District. 1866-9/18/1947. Photograph with caption "Mississippi River Lock #10. 'P.W.A.' Contract #W741, ENG 1410. Mono. 20 'L' showing pile foundation and reinforcing steel. Looking southwest.". 1934-07-30. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/282401. (Accessed June 20, 2018.)
APA citation style
War Department. Office of the Chief of Engineers. St. Paul District. 1866-9/18/1947, (1934-07-30) Photograph with caption "Mississippi River Lock #10. 'P.W.A.' Contract #W741, ENG 1410. Mono. 20 'L' showing pile foundation and reinforcing steel. Looking southwest.". Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/282401
MLA citation style
War Department. Office of the Chief of Engineers. St. Paul District. 1866-9/18/1947. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/282401>.
Note: These citations are programmatically generated and may be incomplete.