MLA
An Man in a Suit and Hat Sitting in a Chair, Holding a Cigarette. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/197xksn058-cor.
APA, 6th edition
An man in a suit and hat sitting in a chair, holding a cigarette (Box 73). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/197xksn058-cor.
Chicago
“An Man in a Suit and Hat Sitting in a Chair, Holding a Cigarette.” 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/197xksn058-cor.