MLA
Confederate General Richard Stoddert Ewell. E. and H. T. Anthony, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 16, Folder 23. https://digital.library.emory.edu/purl/812893204b-cor.
APA, 6th edition
Confederate general Richard Stoddert Ewell (Box 16, Folder 23). (1861). [Cartes-de-visite (card photographs)]. E. and H. T. Anthony; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/812893204b-cor.
Chicago
“Confederate General Richard Stoddert Ewell.” Cartes-de-visite (card photographs). Civil War Collection. New York City, NY: E. and H. T. Anthony, 1861. Box 16, Folder 23. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/812893204b-cor.