MLA
Miller, Kelly, 1863-1939. Is race difference fundamental, eternal and inescapable? : an open letter to President Warren G. Harding. XXXX. African American Imprints Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/709w0vt5bs-cor.
APA, 6th edition
Miller, Kelly, 1863-1939. (XXXX)[Is race difference fundamental, eternal and inescapable? : an open letter to President Warren G. Harding]. African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/709w0vt5bs-cor.
Chicago
Miller, Kelly, 1863-1939, Is race difference fundamental, eternal and inescapable? : an open letter to President Warren G. Harding, XXXX, African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/709w0vt5bs-cor.