MLA
Four Train Engines at Round House in Atlanta, Georgia. 1864. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 14, Folder 5. https://digital.library.emory.edu/purl/713905qh0w-cor.
APA, 6th edition
Four train engines at Round House in Atlanta, Georgia (Box 14, Folder 5). (1864). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/713905qh0w-cor.
Chicago
“Four Train Engines at Round House in Atlanta, Georgia.” Black-and-white photographs. Civil War Collection, 1864. Box 14, Folder 5. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/713905qh0w-cor.