MLA
Belvin, T. Sumpter. Letter from T. Sumpter Belvin (Prisoner of War at Fort Delaware), to His Father, Major James W. Belvin. T. Sumpter Belvin Served in Company A of the 11th Georgia Infantry Regiment - March 1, 1864 with Contextual Information Added Later on by Pansy Aiken Slappey, Grand-Nephew-in-Law of T. Sumpter Belvin (Typescript). 1864. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 24. https://digital.library.emory.edu/purl/24298sf894-cor.
APA, 6th edition
Belvin, T. S. (1864). Letter from T. Sumpter Belvin (prisoner of war at Fort Delaware), to his father, Major James W. Belvin. T. Sumpter Belvin served in Company A of the 11th Georgia Infantry Regiment - March 1, 1864 with contextual information added later on by Pansy Aiken Slappey, grand-nephew-in-law of T. Sumpter Belvin (typescript) (Box 6, Folder 24) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/24298sf894-cor.
Chicago
Belvin, T. Sumpter. “Letter from T. Sumpter Belvin (Prisoner of War at Fort Delaware), to His Father, Major James W. Belvin. T. Sumpter Belvin Served in Company A of the 11th Georgia Infantry Regiment - March 1, 1864 with Contextual Information Added Later on by Pansy Aiken Slappey, Grand-Nephew-in-Law of T. Sumpter Belvin (Typescript).” Letters (correspondence). Civil War Collection, 1864. Box 6, Folder 24. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/24298sf894-cor.