MLA
Co., E. C. Kropp. Cabin Scene at Chickasaw Bluffs Battlefield, Vicksburg, Miss. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/668x95x6d1-cor.
APA, 6th edition
Co., E. C. K. Cabin scene at Chickasaw Bluffs Battlefield, Vicksburg, Miss. (Box 71) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/668x95x6d1-cor.
Chicago
Co., E. C. Kropp. “Cabin Scene at Chickasaw Bluffs Battlefield, Vicksburg, Miss.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 71. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/668x95x6d1-cor.