MLA
Union General Franz Sigel. 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 22, Folder 44. https://digital.library.emory.edu/purl/9182jm6549-cor.
APA, 6th edition
Union general Franz Sigel (Box 22, Folder 44). (1861). [Cartes-de-visite (card photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9182jm6549-cor.
Chicago
“Union General Franz Sigel.” Cartes-de-visite (card photographs). Civil War Collection, 1861. Box 22, Folder 44. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9182jm6549-cor.