MLA
Baggett[?], A. R. Letter from A. R. Baggett[?] (Camp Sumter, Andersonville, Georgia) to His Parents - January 9, 1865 (Typescript). 1865. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 14. https://digital.library.emory.edu/purl/477sn02w50-cor.
APA, 6th edition
Baggett[?], A. R. (1865). Letter from A. R. Baggett[?] (Camp Sumter, Andersonville, Georgia) to his parents - January 9, 1865 (typescript) (Box 1, Folder 14) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/477sn02w50-cor.
Chicago
Baggett[?], A. R. “Letter from A. R. Baggett[?] (Camp Sumter, Andersonville, Georgia) to His Parents - January 9, 1865 (Typescript).” Letters (correspondence). Civil War Collection, 1865. Box 1, Folder 14. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/477sn02w50-cor.