MLA
African American Man Sitting on a Chair with His Legs Crossed, While Wearing a Suit, Bow Tie and Hat. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/3483j9kd6p-cor.
APA, 6th edition
African American man sitting on a chair with his legs crossed, while wearing a suit, bow tie and hat (Box 72). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3483j9kd6p-cor.
Chicago
“African American Man Sitting on a Chair with His Legs Crossed, While Wearing a Suit, Bow Tie and Hat.” 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/3483j9kd6p-cor.