MLA
Ulysses S. Grant and His Staff at Lookout Mountain, Tennessee. 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 22, Folder 20. https://digital.library.emory.edu/purl/095j9kd67c-cor.
APA, 6th edition
Ulysses S. Grant and his staff at Lookout Mountain, Tennessee (Box 22, Folder 20). (1863). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/095j9kd67c-cor.
Chicago
“Ulysses S. Grant and His Staff at Lookout Mountain, Tennessee.” Postcards. Civil War Collection, 1863. Box 22, Folder 20. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/095j9kd67c-cor.