MLA
Appleton, D., and Co. Union General Henry Halleck. D. Appleton & Co., 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 22, Folder 22. https://digital.library.emory.edu/purl/6623bk3kgh-cor.
APA, 6th edition
Appleton, D., & C. (1861). Union general Henry Halleck (Box 22, Folder 22) [Cartes-de-visite (card photographs)]. D. Appleton & Co.; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6623bk3kgh-cor.
Chicago
Appleton, D., and Co. “Union General Henry Halleck.” Cartes-de-visite (card photographs). Civil War Collection. New York City, NY: D. Appleton & Co., 1861. Box 22, Folder 22. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6623bk3kgh-cor.