MLA
Spencer, Thomas. House in Coosa, Georgia That Served as Confederate General Braxton Bragg's Headquarters While He Was Retreated from Union General William Tecumseh Sherman. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 2. https://digital.library.emory.edu/purl/0580k6dkm9-cor.
APA, 6th edition
Spencer, T. (1940). House in Coosa, Georgia that served as Confederate general Braxton Bragg's headquarters while he was retreated from Union general William Tecumseh Sherman (Box 15, Folder 2) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0580k6dkm9-cor.
Chicago
Spencer, Thomas. “House in Coosa, Georgia That Served as Confederate General Braxton Bragg's Headquarters While He Was Retreated from Union General William Tecumseh Sherman.” Black-and-white photographs. Civil War Collection, 1940. Box 15, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0580k6dkm9-cor.