MLA
Spencer, Thomas. Railroad Being Moved at Allatoona, Georgia. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 14, Folder 3. https://digital.library.emory.edu/purl/873pvmcwjr-cor.
APA, 6th edition
Spencer, T. (1940). Railroad being moved at Allatoona, Georgia (Box 14, Folder 3) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/873pvmcwjr-cor.
Chicago
Spencer, Thomas. “Railroad Being Moved at Allatoona, Georgia.” Black-and-white photographs. Civil War Collection, 1940. Box 14, Folder 3. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/873pvmcwjr-cor.