MLA
Thomas, Robert. Cotton Pickin Time in the South. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/97634tmpkg-cor.
APA, 6th edition
Thomas, R. Cotton pickin time in the south (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/97634tmpkg-cor.
Chicago
Thomas, Robert. “Cotton Pickin Time in the South.” Photographic 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/97634tmpkg-cor.