MLA
Mitchell, Edward H. Happy Go Lucky Coons : Two African American Boys in Suspenders [Hand Colored]. 1832. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/8601zcrjgm-cor.
APA, 6th edition
Mitchell, E. H. (1832). Happy go lucky coons : two African American boys in suspenders [hand colored] (Box 72) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8601zcrjgm-cor.
Chicago
Mitchell, Edward H. “Happy Go Lucky Coons : Two African American Boys in Suspenders [Hand Colored].” Photographic postcards. Robert Langmuir African American Photograph Collection, 1832. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8601zcrjgm-cor.