MLA
Spencer, Thomas. Historical Marker for the McKelvey Home, Cass Station, Georgia. 1948. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 1. https://digital.library.emory.edu/purl/39995x6btt-cor.
APA, 6th edition
Spencer, T. (1948). Historical marker for the McKelvey Home, Cass Station, Georgia (Box 15, Folder 1) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/39995x6btt-cor.
Chicago
Spencer, Thomas. “Historical Marker for the McKelvey Home, Cass Station, Georgia.” Black-and-white photographs. Civil War Collection, 1948. Box 15, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/39995x6btt-cor.