MLA
Deep South Specialties, Inc. Three African American Men Driving Mechanical Pickers in a Cotton Field. 1969. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/197xksn069-cor.
APA, 6th edition
Deep South Specialties, I. (1969). Three African American men driving mechanical pickers in a cotton field (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/197xksn069-cor.
Chicago
Deep South Specialties, Inc. “Three African American Men Driving Mechanical Pickers in a Cotton Field.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1969. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/197xksn069-cor.