MLA
Cotton Picking : a Group of African American Men and Women. 1903. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/822h70rxzq-cor.
APA, 6th edition
Cotton picking : a group of African American men and women (Box 74). (1903). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/822h70rxzq-cor.
Chicago
“Cotton Picking : a Group of African American Men and Women.” Postcards. Robert Langmuir African American Photograph Collection, 1903. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/822h70rxzq-cor.