MLA
Sanders, James M. Letter from James M. Sanders [near Malvern Hill, Virginia] to His Father. Sanders Served in Company C of the 16th Georgia Infantry Regiment. Sanders Died in Sharpsburg, Maryland at the Battle of Antietam on September 17, 1862 - August 10, 1862 (Typescript). 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 10. https://digital.library.emory.edu/purl/9354f4qs4x-cor.
APA, 6th edition
Sanders, J. M. (1862). Letter from James M. Sanders [near Malvern Hill, Virginia] to his father. Sanders served in Company C of the 16th Georgia Infantry Regiment. Sanders died in Sharpsburg, Maryland at the Battle of Antietam on September 17, 1862 - August 10, 1862 (typescript) (Box 6, Folder 10) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9354f4qs4x-cor.
Chicago
Sanders, James M. “Letter from James M. Sanders [near Malvern Hill, Virginia] to His Father. Sanders Served in Company C of the 16th Georgia Infantry Regiment. Sanders Died in Sharpsburg, Maryland at the Battle of Antietam on September 17, 1862 - August 10, 1862 (Typescript).” Letters (correspondence). Civil War Collection, 1862. Box 6, Folder 10. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9354f4qs4x-cor.