MLA
Three African American Men Eating Watermelons. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/047rn8pk3d-cor.
APA, 6th edition
Three African American men eating watermelons (Box 69). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/047rn8pk3d-cor.
Chicago
“Three African American Men Eating Watermelons.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/047rn8pk3d-cor.