MLA
Hall, James. Letter from James Hall (Camp near Fredericksburg, Virginia) to "Dear Brother" James Hall Was a Members of Company H of the 38th Georgia Infantry Regiment - December 12, 1862 (Typescript). 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 3, Folder 44. https://digital.library.emory.edu/purl/68605qfvs1-cor.
APA, 6th edition
Hall, J. (1862). Letter from James Hall (Camp near Fredericksburg, Virginia) to "Dear brother" James Hall was a members of Company H of the 38th Georgia Infantry Regiment - December 12, 1862 (typescript) (Box 3, Folder 44) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/68605qfvs1-cor.
Chicago
Hall, James. “Letter from James Hall (Camp near Fredericksburg, Virginia) to ‘Dear Brother’ James Hall Was a Members of Company H of the 38th Georgia Infantry Regiment - December 12, 1862 (Typescript).” Letters (correspondence). Civil War Collection, 1862. Box 3, Folder 44. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/68605qfvs1-cor.