MLA
Ford, Andrew. Letter from Lieutenant Andrew Ford (Knoxsville, Tennessee) to Captain Thomas Maguire - April 22, 1862 (Typescript). 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7, Folder 15. https://digital.library.emory.edu/purl/972p5hqd1b-cor.
APA, 6th edition
Ford, A. (1862). Letter from Lieutenant Andrew Ford (Knoxsville, Tennessee) to Captain Thomas Maguire - April 22, 1862 (typescript) (Box 7, Folder 15) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/972p5hqd1b-cor.
Chicago
Ford, Andrew. “Letter from Lieutenant Andrew Ford (Knoxsville, Tennessee) to Captain Thomas Maguire - April 22, 1862 (Typescript).” Letters (correspondence). Civil War Collection, 1862. Box 7, Folder 15. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/972p5hqd1b-cor.