MLA
Spencer, Thomas. Historical Marker Site for the Battle of Chickamauga in Chickamauga, Georgia. 1957. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 1. https://digital.library.emory.edu/purl/5870vt4cc0-cor.
APA, 6th edition
Spencer, T. (1957). Historical marker site for the Battle of Chickamauga in Chickamauga, Georgia (Box 15, Folder 1) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5870vt4cc0-cor.
Chicago
Spencer, Thomas. “Historical Marker Site for the Battle of Chickamauga in Chickamauga, 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/5870vt4cc0-cor.