MLA
Spencer, Thomas. Old Railroad Tunnel at Tunnel Hill, Georgia. 1950. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 2. https://digital.library.emory.edu/purl/293gxd2670-cor.
APA, 6th edition
Spencer, T. (1950). Old railroad tunnel at Tunnel Hill, Georgia (Box 15, Folder 2) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd2670-cor.
Chicago
Spencer, Thomas. “Old Railroad Tunnel at Tunnel Hill, Georgia.” Black-and-white photographs. Civil War Collection, 1950. Box 15, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd2670-cor.