MLA
Morris, William S. Letter from J. M. Morris (Richmond, Virginia) to J. A. Seddon Requesting the Detail of W. H. Jewell of the 21st Mississippi Infantry Regiment as a Telegraph Operator - August 31, 1864. 1864. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5, Folder 30. https://digital.library.emory.edu/purl/566j0zpd93-cor.
APA, 6th edition
Morris, W. S. (1864). Letter from J. M. Morris (Richmond, Virginia) to J. A. Seddon requesting the detail of W. H. Jewell of the 21st Mississippi Infantry Regiment as a telegraph operator - August 31, 1864 (Box 5, Folder 30) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/566j0zpd93-cor.
Chicago
Morris, William S. “Letter from J. M. Morris (Richmond, Virginia) to J. A. Seddon Requesting the Detail of W. H. Jewell of the 21st Mississippi Infantry Regiment as a Telegraph Operator - August 31, 1864.” Letters (correspondence). Civil War Collection, 1864. Box 5, Folder 30. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/566j0zpd93-cor.