MLA
Columbia. Picking Cotton the Hard Way : an African American Girl Picking Cotton. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/53976hdrc3-cor.
APA, 6th edition
C. Picking cotton the hard way : an African American girl picking cotton (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/53976hdrc3-cor.
Chicago
Columbia. “Picking Cotton the Hard Way : an African American Girl Picking Cotton.” 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/53976hdrc3-cor.