MLA
Spencer, Thomas. Historical Marker Site of Camp Sumter Prison, Also Known as Andersonville Prison, in Andersonville, Georgia. 1957. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 1. https://digital.library.emory.edu/purl/887brv16js-cor.
APA, 6th edition
Spencer, T. (1957). Historical marker site of Camp Sumter prison, also known as Andersonville Prison, in Andersonville, Georgia (Box 15, Folder 1) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/887brv16js-cor.
Chicago
Spencer, Thomas. “Historical Marker Site of Camp Sumter Prison, Also Known as Andersonville Prison, in Andersonville, Georgia.” Black-and-white photographs. Civil War Collection, 1957. Box 15, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/887brv16js-cor.