MLA
Spencer, Thomas. Historical Marker of the Park Home and Site of Park's Mill in Morgan County, Georgia. 1950. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 1. https://digital.library.emory.edu/purl/556931zdw9-cor.
APA, 6th edition
Spencer, T. (1950). Historical marker of the Park Home and site of Park's Mill in Morgan County, Georgia (Box 15, Folder 1) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/556931zdw9-cor.
Chicago
Spencer, Thomas. “Historical Marker of the Park Home and Site of Park's Mill in Morgan County, Georgia.” Black-and-white photographs. Civil War Collection, 1950. Box 15, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/556931zdw9-cor.