MLA
Taylor, Thomas. Letter from Thomas Taylor (Nashville, Tennessee) to His Sister, Laura - December 15, 1864 (Typescript). 1864. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 47. https://digital.library.emory.edu/purl/836547d8m4-cor.
APA, 6th edition
Taylor, T. (1864). Letter from Thomas Taylor (Nashville, Tennessee) to his sister, Laura - December 15, 1864 (typescript) (Box 6, Folder 47) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/836547d8m4-cor.
Chicago
Taylor, Thomas. “Letter from Thomas Taylor (Nashville, Tennessee) to His Sister, Laura - December 15, 1864 (Typescript).” Letters (correspondence). Civil War Collection, 1864. Box 6, Folder 47. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/836547d8m4-cor.