MLA
Portrait of an African American Man Wearing a Suit, Bow Tie, and a Hat. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/945cc2fr1r-cor.
APA, 6th edition
Portrait of an African American man wearing a suit, bow tie, and a hat (Box 73). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/945cc2fr1r-cor.
Chicago
“Portrait of an African American Man Wearing a Suit, Bow Tie, and a Hat.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 73. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/945cc2fr1r-cor.