MLA
African American Man in a Suit, Standing in Front of a Piano. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/1913n5tb4x-cor.
APA, 6th edition
African American man in a suit, standing in front of a piano (Box 72). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1913n5tb4x-cor.
Chicago
“African American Man in a Suit, Standing in Front of a Piano.” 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/1913n5tb4x-cor.