MLA
Photograph of Nancy Ball Slappey, Wife of George H. Slappey. George H. Slappey Slappey Served in Joe Brown's Guard during the Atlanta Campaign. 1860. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 24. https://digital.library.emory.edu/purl/064tht7771-cor.
APA, 6th edition
Photograph of Nancy Ball Slappey, wife of George H. Slappey. George H. Slappey Slappey served in Joe Brown's Guard during the Atlanta Campaign (Box 6, Folder 24). (1860). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/064tht7771-cor.
Chicago
“Photograph of Nancy Ball Slappey, Wife of George H. Slappey. George H. Slappey Slappey Served in Joe Brown's Guard during the Atlanta Campaign.” Black-and-white photographs. Civil War Collection, 1860. Box 6, Folder 24. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/064tht7771-cor.