MLA
Spencer, Thomas. Gravesite of Two Unknown Confederate Soldiers in Adairsville, Georgia. 1953. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 14, Folder 21. https://digital.library.emory.edu/purl/419s1rn9sk-cor.
APA, 6th edition
Spencer, T. (1953). Gravesite of two unknown Confederate soldiers in Adairsville, Georgia (Box 14, Folder 21) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/419s1rn9sk-cor.
Chicago
Spencer, Thomas. “Gravesite of Two Unknown Confederate Soldiers in Adairsville, Georgia.” Black-and-white photographs. Civil War Collection, 1953. Box 14, Folder 21. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/419s1rn9sk-cor.