MLA
Binion, James. Letter from James Binion to "Dear Sister." James Served with the 10th Georgia Regiment, Company F - November, 1861. 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 29. https://digital.library.emory.edu/purl/378tb2rcnh-cor.
APA, 6th edition
Binion, J. (1861). Letter from James Binion to "Dear Sister." James served with the 10th Georgia Regiment, Company F - November, 1861 (Box 1, Folder 29) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/378tb2rcnh-cor.
Chicago
Binion, James. “Letter from James Binion to ‘Dear Sister." James Served with the 10th Georgia Regiment, Company F - November, 1861.” Letters (correspondence). Civil War Collection, 1861. Box 1, Folder 29. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/378tb2rcnh-cor.