MLA
Photo, Official Air Force. Military: Air Force ROTC - Barracks Inspection at Ellington Air Force Base. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 25, Folder 1. https://digital.library.emory.edu/purl/5977sqvbqb-cor.
APA, 6th edition
Photo, O. A. F. (1940). Military: Air Force ROTC - Barracks inspection at Ellington Air Force Base (Box 25, Folder 1) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5977sqvbqb-cor.
Chicago
Photo, Official Air Force. “Military: Air Force ROTC - Barracks Inspection at Ellington Air Force Base.” Black-and-white photographs. EU Office of Alumni Publications Photos Deposit Collection 2 , 1940. Box 25, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5977sqvbqb-cor.