MLA
Rebel Army of Southwest - Confederate Generals Joseph E. Johnston, Sterling Price, Nathan Bedford Forrest, Franklin Gardner, Braxton Bragg, Edmund Kirby Smith, and John Bell Hood. E. and H. T. Anthony, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 17, Folder 38. https://digital.library.emory.edu/purl/938jdfn437-cor.
APA, 6th edition
Rebel Army of Southwest - Confederate generals Joseph E. Johnston, Sterling Price, Nathan Bedford Forrest, Franklin Gardner, Braxton Bragg, Edmund Kirby Smith, and John Bell Hood (Box 17, Folder 38). (1861). [Cartes-de-visite (card photographs)]. E. and H. T. Anthony; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn437-cor.
Chicago
“Rebel Army of Southwest - Confederate Generals Joseph E. Johnston, Sterling Price, Nathan Bedford Forrest, Franklin Gardner, Braxton Bragg, Edmund Kirby Smith, and John Bell Hood.” Cartes-de-visite (card photographs). Civil War Collection. New York City, NY: E. and H. T. Anthony, 1861. Box 17, Folder 38. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn437-cor.