MLA
Anderson, Jim L. Letter from Jim L. Anderson (Camp Beauregard, Kentucky) to His Mother. Jim L. Anderson Served in the 8th Confederate Cavalry Regiment - January 31, 1862. 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 4. https://digital.library.emory.edu/purl/641mgqnm9j-cor.
APA, 6th edition
Anderson, J. L. (1862). Letter from Jim L. Anderson (Camp Beauregard, Kentucky) to his mother. Jim L. Anderson served in the 8th Confederate Cavalry Regiment - January 31, 1862 (Box 1, Folder 4) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/641mgqnm9j-cor.
Chicago
Anderson, Jim L. “Letter from Jim L. Anderson (Camp Beauregard, Kentucky) to His Mother. Jim L. Anderson Served in the 8th Confederate Cavalry Regiment - January 31, 1862.” Letters (correspondence). Civil War Collection, 1862. Box 1, Folder 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/641mgqnm9j-cor.