MLA
An African American Man in a Suit and Hat Sitting in a Chair. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/740ksn02xs-cor.
APA, 6th edition
An African American man in a suit and hat sitting in a chair (Box 73). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/740ksn02xs-cor.
Chicago
“An African American Man in a Suit and Hat Sitting in a Chair.” 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/740ksn02xs-cor.