MLA
Spencer, Thomas. Site of the Battle of Cowpens in Cowpens, South Carolina. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 6. https://digital.library.emory.edu/purl/337vmcvfvf-cor.
APA, 6th edition
Spencer, T. (1940). Site of the Battle of Cowpens in Cowpens, South Carolina (Box 15, Folder 6) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/337vmcvfvf-cor.
Chicago
Spencer, Thomas. “Site of the Battle of Cowpens in Cowpens, South Carolina.” Black-and-white photographs. Civil War Collection, 1940. Box 15, Folder 6. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/337vmcvfvf-cor.