MLA
Five Men Eating Watermelons Sitting on a Stack of Logs. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/3074tmpg7s-cor.
APA, 6th edition
Five men eating watermelons sitting on a stack of logs (Box 69). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3074tmpg7s-cor.
Chicago
“Five Men Eating Watermelons Sitting on a Stack of Logs.” 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/3074tmpg7s-cor.