MLA
African American Man in a Suit Sitting on a Chair, with a Hat on His Knee, with His Sister in a Coat Standing next to Him. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/296wwpzgpm-cor.
APA, 6th edition
African American man in a suit sitting on a chair, with a hat on his knee, with his sister in a coat standing next to him (Box 72). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/296wwpzgpm-cor.
Chicago
“African American Man in a Suit Sitting on a Chair, with a Hat on His Knee, with His Sister in a Coat Standing next to Him.” 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/296wwpzgpm-cor.