MLA
Valentine, and Sons. Picking Oranges in Florida : African American Men on Ladders. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/1848pk0p5c-cor.
APA, 6th edition
V., & S. Picking oranges in Florida : African American men on ladders (Box 68) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1848pk0p5c-cor.
Chicago
Valentine, and Sons. “Picking Oranges in Florida : African American Men on Ladders.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1848pk0p5c-cor.