MLA
Spencer, Thomas. Monument in Tupelo, Mississippi to Those Who Died at the Battle of Brice's Cross Roads on June 10, 1864. 1948. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 4. https://digital.library.emory.edu/purl/866vx0k7kb-cor.
APA, 6th edition
Spencer, T. (1948). Monument in Tupelo, Mississippi to those who died at the Battle of Brice's Cross Roads on June 10, 1864 (Box 15, Folder 4) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/866vx0k7kb-cor.
Chicago
Spencer, Thomas. “Monument in Tupelo, Mississippi to Those Who Died at the Battle of Brice's Cross Roads on June 10, 1864.” Black-and-white photographs. Civil War Collection, 1948. Box 15, Folder 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/866vx0k7kb-cor.