MLA
Spencer, Thomas. Historical Marker of the Gravesite of Confederate General Alfred Holt Colquitt in Macon, Georgia. 1950. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 1. https://digital.library.emory.edu/purl/5462547fdj-cor.
APA, 6th edition
Spencer, T. (1950). Historical marker of the gravesite of Confederate general Alfred Holt Colquitt in Macon, Georgia (Box 15, Folder 1) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5462547fdj-cor.
Chicago
Spencer, Thomas. “Historical Marker of the Gravesite of Confederate General Alfred Holt Colquitt in Macon, 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/5462547fdj-cor.