MLA
Spencer, Thomas. Tombstone of Honora Sweney, a Nurse Who Contracted a Disease While Working with Wounded Confederate Soldiers, Died, and Was Buried among Confederate Soldiers in Forsyth, Georgia. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 14, Folder 21. https://digital.library.emory.edu/purl/4579s4mx7v-cor.
APA, 6th edition
Spencer, T. (1940). Tombstone of Honora Sweney, a nurse who contracted a disease while working with wounded Confederate soldiers, died, and was buried among Confederate soldiers in Forsyth, Georgia (Box 14, Folder 21) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4579s4mx7v-cor.
Chicago
Spencer, Thomas. “Tombstone of Honora Sweney, a Nurse Who Contracted a Disease While Working with Wounded Confederate Soldiers, Died, and Was Buried among Confederate Soldiers in Forsyth, Georgia.” 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/4579s4mx7v-cor.