MLA
Ferguson. Eldon Morley, an African American Man, Sitting on a Chair While Wearing a Suit. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/047rn8pk2c-cor.
APA, 6th edition
F. Eldon Morley, an African American man, sitting on a chair while wearing a suit (Box 72) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/047rn8pk2c-cor.
Chicago
Ferguson. “Eldon Morley, an African American Man, Sitting on a Chair While Wearing a Suit.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/047rn8pk2c-cor.