MLA
Spencer, Thomas. Tombstone of Colonel Robert F. Beckham at Saint John's Cemetery in Ashwood, Tennessee. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 7. https://digital.library.emory.edu/purl/7032280hfq-cor.
APA, 6th edition
Spencer, T. (1940). Tombstone of Colonel Robert F. Beckham at Saint John's Cemetery in Ashwood, Tennessee (Box 15, Folder 7) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7032280hfq-cor.
Chicago
Spencer, Thomas. “Tombstone of Colonel Robert F. Beckham at Saint John's Cemetery in Ashwood, Tennessee.” Black-and-white photographs. Civil War Collection, 1940. Box 15, Folder 7. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7032280hfq-cor.