MLA
President of the Confederate States Jefferson Davis. 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 16, Folder 20. https://digital.library.emory.edu/purl/112m63xt7n-cor.
APA, 6th edition
President of the Confederate States Jefferson Davis (Box 16, Folder 20). (1861). [Cartes-de-visite (card photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/112m63xt7n-cor.
Chicago
“President of the Confederate States Jefferson Davis.” Cartes-de-visite (card photographs). Civil War Collection, 1861. Box 16, Folder 20. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/112m63xt7n-cor.