MLA
Turner, Elizabeth. Letter from Elizabeth Turner (Campbell County, Georgia) to Nephew, John N. Dorsey (Typescript). Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 3, Folder 8. https://digital.library.emory.edu/purl/6451g1jxvc-cor.
APA, 6th edition
Turner, E. Letter from Elizabeth Turner (Campbell County, Georgia) to nephew, John N. Dorsey (typescript) (Box 3, Folder 8) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6451g1jxvc-cor.
Chicago
Turner, Elizabeth. “Letter from Elizabeth Turner (Campbell County, Georgia) to Nephew, John N. Dorsey (Typescript).” Letters (correspondence). Civil War Collection, n.d. Box 3, Folder 8. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6451g1jxvc-cor.