MLA
Brothers, Lane. Military: Army - Group Portrait of Five Military Officials. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 24, Folder 6. https://digital.library.emory.edu/purl/95918932v9-cor.
APA, 6th edition
Brothers, L. (1940). Military: Army - Group portrait of five military officials (Box 24, Folder 6) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/95918932v9-cor.
Chicago
Brothers, Lane. “Military: Army - Group Portrait of Five Military Officials.” Black-and-white photographs. EU Office of Alumni Publications Photos Deposit Collection 2 , 1940. Box 24, Folder 6. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/95918932v9-cor.