MLA
Mingledorff, J. C. Letter from J. C. Mingledorff to W. W. Wilson. Wilson, a Surgeon, Served in the 35th Georgia Infantry Regiment. 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7, Folder 36. https://digital.library.emory.edu/purl/682k6djjfw-cor.
APA, 6th edition
Mingledorff, J. C. (1861). Letter from J. C. Mingledorff to W. W. Wilson. Wilson, a surgeon, served in the 35th Georgia Infantry Regiment (Box 7, Folder 36) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/682k6djjfw-cor.
Chicago
Mingledorff, J. C. “Letter from J. C. Mingledorff to W. W. Wilson. Wilson, a Surgeon, Served in the 35th Georgia Infantry Regiment.” Letters (correspondence). Civil War Collection, 1861. Box 7, Folder 36. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/682k6djjfw-cor.