Photograph of Sound Detector in the Machine Room

Chicago citation style
General Services Administration. National Archives and Records Service. Office of Educational Programs. Education Division. ?-4/1/1985. Photograph of Sound Detector in the Machine Room. 1942-07-27. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/12168992. (Accessed October 21, 2018.)
APA citation style
General Services Administration. National Archives and Records Service. Office of Educational Programs. Education Division. ?-4/1/1985, (1942-07-27) Photograph of Sound Detector in the Machine Room. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/12168992
MLA citation style
General Services Administration. National Archives and Records Service. Office of Educational Programs. Education Division. ?-4/1/1985. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/12168992>.
Note: These citations are programmatically generated and may be incomplete.