MLA
Galleries, Brady's National Photographic Portrait. Union General Fitz-John Porter. E. Anthony, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 22, Folder 37. https://digital.library.emory.edu/purl/866vx0k7n2-cor.
APA, 6th edition
Galleries, B. N. P. P. (1861). Union general Fitz-John Porter (Box 22, Folder 37) [Cartes-de-visite (card photographs)]. E. Anthony; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/866vx0k7n2-cor.
Chicago
Galleries, Brady's National Photographic Portrait. “Union General Fitz-John Porter.” Cartes-de-visite (card photographs). Civil War Collection. New York City, NY: E. Anthony, 1861. Box 22, Folder 37. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/866vx0k7n2-cor.