MLA
Spencer, Thomas. Graves in Waynesboro, Georgia Marking Battle between Union General William Tecumseh Sherman and Confederate General Joseph Wheeler during Sherman's March to the Sea. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 14, Folder 21. https://digital.library.emory.edu/purl/293gxd266b-cor.
APA, 6th edition
Spencer, T. (1940). Graves in Waynesboro, Georgia marking battle between Union general William Tecumseh Sherman and Confederate general Joseph Wheeler during Sherman's March to the Sea (Box 14, Folder 21) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd266b-cor.
Chicago
Spencer, Thomas. “Graves in Waynesboro, Georgia Marking Battle between Union General William Tecumseh Sherman and Confederate General Joseph Wheeler during Sherman's March to the Sea.” Black-and-white photographs. Civil War Collection, 1940. Box 14, Folder 21. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd266b-cor.