MLA
Spencer, Thomas. Stars and Bars Flag of the Confederate States of America at Carter House in Franklin, Tennessee. The Seven Stars Indicates the Flag Was Created between March 4 and May 21, 1861. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 7. https://digital.library.emory.edu/purl/583kwh71vx-cor.
APA, 6th edition
Spencer, T. (1940). Stars and Bars flag of the Confederate States of America at Carter House in Franklin, Tennessee. The seven stars indicates the flag was created between March 4 and May 21, 1861 (Box 15, Folder 7) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/583kwh71vx-cor.
Chicago
Spencer, Thomas. “Stars and Bars Flag of the Confederate States of America at Carter House in Franklin, Tennessee. The Seven Stars Indicates the Flag Was Created between March 4 and May 21, 1861.” Black-and-white photographs. Civil War Collection, 1940. Box 15, Folder 7. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/583kwh71vx-cor.