MLA
Anderson, Jim L. Letter from Jim L. Anderson (Camp Beauregard, Kentucky) to His Father, Saxon Anderson (Talladega, Alabama). Jim L. Anderson Served in the 8th Confederate Cavalry Regiment - February 6, 1862. 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 4. https://digital.library.emory.edu/purl/624jm63ztj-cor.
APA, 6th edition
Anderson, J. L. (1862). Letter from Jim L. Anderson (Camp Beauregard, Kentucky) to his father, Saxon Anderson (Talladega, Alabama). Jim L. Anderson served in the 8th Confederate Cavalry Regiment - February 6, 1862 (Box 1, Folder 4) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/624jm63ztj-cor.
Chicago
Anderson, Jim L. “Letter from Jim L. Anderson (Camp Beauregard, Kentucky) to His Father, Saxon Anderson (Talladega, Alabama). Jim L. Anderson Served in the 8th Confederate Cavalry Regiment - February 6, 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/624jm63ztj-cor.