MLA
Harwell, Richard Barksdale. Request by the Emory University Library to the National Archives and Records Service for Information on Henry S. Boutell. 1953. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 19, Folder 8. https://digital.library.emory.edu/purl/006sxksp4p-cor.
APA, 6th edition
Harwell, R. B. (1953). Request by the Emory University Library to the National Archives and Records Service for information on Henry S. Boutell (Box 19, Folder 8) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/006sxksp4p-cor.
Chicago
Harwell, Richard Barksdale. “Request by the Emory University Library to the National Archives and Records Service for Information on Henry S. Boutell.” Letters (correspondence). Civil War Collection, 1953. Box 19, Folder 8. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/006sxksp4p-cor.