MLA
Confederate General and Politician Humphrey Marshall. E. and H. T. Anthony, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 17, Folder 2. https://digital.library.emory.edu/purl/631cjsxmx2-cor.
APA, 6th edition
Confederate general and politician Humphrey Marshall (Box 17, Folder 2). (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/631cjsxmx2-cor.
Chicago
“Confederate General and Politician Humphrey Marshall.” Cartes-de-visite (card photographs). Civil War Collection. New York City, NY: E. and H. T. Anthony, 1861. Box 17, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/631cjsxmx2-cor.