MLA
Co., Kansas City Post Card. Satisfied : African American Boy with a Watermelon Slice. 1909. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/276f1vhhqv-cor.
APA, 6th edition
Co., K. C. P. C. (1909). Satisfied : African American boy with a watermelon slice (Box 69) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/276f1vhhqv-cor.
Chicago
Co., Kansas City Post Card. “Satisfied : African American Boy with a Watermelon Slice.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1909. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/276f1vhhqv-cor.