MLA
Spencer, Thomas. Train Engine in Gainesville, Georgia. 1959. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 2. https://digital.library.emory.edu/purl/535t76hfwx-cor.
APA, 6th edition
Spencer, T. (1959). Train engine in Gainesville, Georgia (Box 15, Folder 2) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/535t76hfwx-cor.
Chicago
Spencer, Thomas. “Train Engine in Gainesville, Georgia.” Black-and-white photographs. Civil War Collection, 1959. Box 15, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/535t76hfwx-cor.