MLA
Galleries, Brady's National Photographic Portrait. Union Major Robert Anderson, Commander of Fort Sumter during the Initial Stages of the Civil War. E. Anthony, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 22, Folder 1. https://digital.library.emory.edu/purl/6558cz8xgm-cor.
APA, 6th edition
Galleries, B. N. P. P. (1861). Union Major Robert Anderson, commander of Fort Sumter during the initial stages of the Civil War (Box 22, Folder 1) [Cartes-de-visite (card photographs)]. E. Anthony; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6558cz8xgm-cor.
Chicago
Galleries, Brady's National Photographic Portrait. “Union Major Robert Anderson, Commander of Fort Sumter during the Initial Stages of the Civil War.” Cartes-de-visite (card photographs). Civil War Collection. New York City, NY: E. Anthony, 1861. Box 22, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6558cz8xgm-cor.