MLA
Anderson, Jim L. Letter from Jim L. Anderson (Fayettville, Tennessee) to His Sister, Maggie. Jim L. Anderson Served in the 8th Confederate Cavalry Regiment - January 26, 1863. 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 4. https://digital.library.emory.edu/purl/4472v6wxpn-cor.
APA, 6th edition
Anderson, J. L. (1863). Letter from Jim L. Anderson (Fayettville, Tennessee) to his sister, Maggie. Jim L. Anderson served in the 8th Confederate Cavalry Regiment - January 26, 1863 (Box 1, Folder 4) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4472v6wxpn-cor.
Chicago
Anderson, Jim L. “Letter from Jim L. Anderson (Fayettville, Tennessee) to His Sister, Maggie. Jim L. Anderson Served in the 8th Confederate Cavalry Regiment - January 26, 1863.” Letters (correspondence). Civil War Collection, 1863. Box 1, Folder 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4472v6wxpn-cor.