MLA
A Young African American Man Standing by a Porch with His Hand on the Post. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/955m905qj9-cor.
APA, 6th edition
A young African American man standing by a porch with his hand on the post (Box 72). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/955m905qj9-cor.
Chicago
“A Young African American Man Standing by a Porch with His Hand on the Post.” 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/955m905qj9-cor.