MLA
African American Man on Back Part of Train. 1896. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 31. https://digital.library.emory.edu/purl/423612jmbs-cor.
APA, 6th edition
African American man on back part of train (Box 31). (1896). [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/423612jmbs-cor.
Chicago
“African American Man on Back Part of Train.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, 1896. Box 31. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/423612jmbs-cor.