MLA
Spencer, Thomas. Historical Marker for "Confederate Hospitals" in Georgia. 1955. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 1. https://digital.library.emory.edu/purl/139x0k6fp0-cor.
APA, 6th edition
Spencer, T. (1955). Historical marker for "Confederate Hospitals" in Georgia (Box 15, Folder 1) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/139x0k6fp0-cor.
Chicago
Spencer, Thomas. “Historical Marker for ‘Confederate Hospitals’ in Georgia.” Black-and-white photographs. Civil War Collection, 1955. Box 15, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/139x0k6fp0-cor.