MLA
Dodson, Florine. Letter from Florine Dodson (Atlanta, Georgia) to the Emory History Department Regarding the Life and Memoirs of William Cary Dodson. 1961. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 8, Folder 19. https://digital.library.emory.edu/purl/716pzgmt16-cor.
APA, 6th edition
Dodson, F. (1961). Letter from Florine Dodson (Atlanta, Georgia) to the Emory History Department regarding the life and memoirs of William Cary Dodson (Box 8, Folder 19) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/716pzgmt16-cor.
Chicago
Dodson, Florine. “Letter from Florine Dodson (Atlanta, Georgia) to the Emory History Department Regarding the Life and Memoirs of William Cary Dodson.” Letters (correspondence). Civil War Collection, 1961. Box 8, Folder 19. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/716pzgmt16-cor.