MLA
Confederate General Earl Van Dorn. 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 17, Folder 27. https://digital.library.emory.edu/purl/52908kpsxr-cor.
APA, 6th edition
Confederate general Earl Van Dorn (Box 17, Folder 27). (1861). [Cartes-de-visite (card photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/52908kpsxr-cor.
Chicago
“Confederate General Earl Van Dorn.” Cartes-de-visite (card photographs). Civil War Collection, 1861. Box 17, Folder 27. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/52908kpsxr-cor.