MLA
Spencer, Thomas. Kelly's Ford between Fauquier and Culpeper Counties in Virginia. Site of a Battle in March 17, 1863. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 8. https://digital.library.emory.edu/purl/064tht77mp-cor.
APA, 6th edition
Spencer, T. (1940). Kelly's Ford between Fauquier and Culpeper Counties in Virginia. Site of a battle in March 17, 1863 (Box 15, Folder 8) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/064tht77mp-cor.
Chicago
Spencer, Thomas. “Kelly's Ford between Fauquier and Culpeper Counties in Virginia. Site of a Battle in March 17, 1863.” Black-and-white photographs. Civil War Collection, 1940. Box 15, Folder 8. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/064tht77mp-cor.