MLA
London, R. M. Uncle Spencer : an Automatic Cotton Picker of Ye Olden Times. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/078gf1vhkp-cor.
APA, 6th edition
London, R. M. Uncle Spencer : an automatic cotton picker of ye olden times (Box 72) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/078gf1vhkp-cor.
Chicago
London, R. M. “Uncle Spencer : an Automatic Cotton Picker of Ye Olden Times.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/078gf1vhkp-cor.