MLA
Thomas, J. W. Letter from J. W. Thomas (Decatur, Georgia) to William E. Mickle - June 3, 1863. 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 9, Folder 17. https://digital.library.emory.edu/purl/443nvx0m7j-cor.
APA, 6th edition
Thomas, J. W. (1863). Letter from J. W. Thomas (Decatur, Georgia) to William E. Mickle - June 3, 1863 (Box 9, Folder 17) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/443nvx0m7j-cor.
Chicago
Thomas, J. W. “Letter from J. W. Thomas (Decatur, Georgia) to William E. Mickle - June 3, 1863.” Letters (correspondence). Civil War Collection, 1863. Box 9, Folder 17. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/443nvx0m7j-cor.