MLA
Spencer, Thomas. Bridge at Sope Creek in Cobb County, Georgia. 1946. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 2. https://digital.library.emory.edu/purl/020fttf03j-cor.
APA, 6th edition
Spencer, T. (1946). Bridge at Sope Creek in Cobb County, Georgia (Box 15, Folder 2) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/020fttf03j-cor.
Chicago
Spencer, Thomas. “Bridge at Sope Creek in Cobb County, Georgia.” Black-and-white photographs. Civil War Collection, 1946. Box 15, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/020fttf03j-cor.