MLA
Brothers., Russell. African American Man Sitting on a Chair While Wearing a Suit and Bow Tie. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/791sf7m0fs-cor.
APA, 6th edition
Brothers., R. African American man sitting on a chair while wearing a suit and bow tie (Box 72) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/791sf7m0fs-cor.
Chicago
Brothers., Russell. “African American Man Sitting on a Chair While Wearing a Suit and Bow Tie.” 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/791sf7m0fs-cor.