MLA
Spencer, Thomas. Tombstone near Decatur, Georgia, of Jacob B. Wheeler of the Confederate States Army. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 14, Folder 5. https://digital.library.emory.edu/purl/27312jm76m-cor.
APA, 6th edition
Spencer, T. (1940). Tombstone near Decatur, Georgia, of Jacob B. Wheeler of the Confederate States Army (Box 14, Folder 5) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/27312jm76m-cor.
Chicago
Spencer, Thomas. “Tombstone near Decatur, Georgia, of Jacob B. Wheeler of the Confederate States Army.” Black-and-white photographs. Civil War Collection, 1940. Box 14, Folder 5. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/27312jm76m-cor.