MLA
Spencer, Thomas. Grave Markers of Confederate Generals Robert Johnson Henderson and James Phillip Simms in Covington, Georgia. 1953. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 14, Folder 21. https://digital.library.emory.edu/purl/955m905rkx-cor.
APA, 6th edition
Spencer, T. (1953). Grave markers of Confederate generals Robert Johnson Henderson and James Phillip Simms in Covington, Georgia (Box 14, Folder 21) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/955m905rkx-cor.
Chicago
Spencer, Thomas. “Grave Markers of Confederate Generals Robert Johnson Henderson and James Phillip Simms in Covington, Georgia.” Black-and-white photographs. Civil War Collection, 1953. Box 14, Folder 21. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/955m905rkx-cor.