MLA
Spencer, Thomas. Jas. A. Callan House in Gaylesville, Alabama. Union General William Sherman Used the House as Headquarters during His Pursuit of Confederate General John Bell Hood's Army. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 14, Folder 1. https://digital.library.emory.edu/purl/030prr4zm2-cor.
APA, 6th edition
Spencer, T. (1940). Jas. A. Callan House in Gaylesville, Alabama. Union general William Sherman used the house as headquarters during his pursuit of Confederate General John Bell Hood's army (Box 14, Folder 1) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/030prr4zm2-cor.
Chicago
Spencer, Thomas. “Jas. A. Callan House in Gaylesville, Alabama. Union General William Sherman Used the House as Headquarters during His Pursuit of Confederate General John Bell Hood's Army.” Black-and-white photographs. Civil War Collection, 1940. Box 14, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/030prr4zm2-cor.