MLA
Mora, José Maria. Lieutenant Colonel George A. Custer, 7th U.S. Cavalry. Mora, 1876. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 22, Folder 10. https://digital.library.emory.edu/purl/3655dv42tr-cor.
APA, 6th edition
Mora, J. M. (1876). Lieutenant Colonel George A. Custer, 7th U.S. Cavalry (Box 22, Folder 10) [Cartes-de-visite (card photographs)]. Mora; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3655dv42tr-cor.
Chicago
Mora, José Maria. “Lieutenant Colonel George A. Custer, 7th U.S. Cavalry.” Cartes-de-visite (card photographs). Civil War Collection. New York City, NY: Mora, 1876. Box 22, Folder 10. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3655dv42tr-cor.