MLA
African American Man Standing While Wearing a Suit, Holding a Hat in One Hand. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/883xsj3v0n-cor.
APA, 6th edition
African American man standing while wearing a suit, holding a hat in one hand (Box 72). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/883xsj3v0n-cor.
Chicago
“African American Man Standing While Wearing a Suit, Holding a Hat in One Hand.” 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/883xsj3v0n-cor.