MLA
Military: Army - Captain Richard O. Keller. 1969. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 24, Folder 4. https://digital.library.emory.edu/purl/750tqjq38h-cor.
APA, 6th edition
Military: Army - Captain Richard O. Keller (Box 24, Folder 4). (1969). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/750tqjq38h-cor.
Chicago
“Military: Army - Captain Richard O. Keller.” Black-and-white photographs. EU Office of Alumni Publications Photos Deposit Collection 2 , 1969. Box 24, Folder 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/750tqjq38h-cor.