MLA
Ward, A. J. Letter from A. J. Ward (Fort Royal, Virginia) to His Brothers and Sisters, Describing His Regiment's Travels in the Past Two Weeks. Ward Was a Member of the 6th Regiment, Company C of General Daniel Harvey Hill's Division - November 8, 1862. 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5, Folder 14. https://digital.library.emory.edu/purl/419s1rn9qg-cor.
APA, 6th edition
Ward, A. J. (1862). Letter from A. J. Ward (Fort Royal, Virginia) to his brothers and sisters, describing his regiment's travels in the past two weeks. Ward was a member of the 6th Regiment, Company C of General Daniel Harvey Hill's Division - November 8, 1862 (Box 5, Folder 14) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/419s1rn9qg-cor.
Chicago
Ward, A. J. “Letter from A. J. Ward (Fort Royal, Virginia) to His Brothers and Sisters, Describing His Regiment's Travels in the Past Two Weeks. Ward Was a Member of the 6th Regiment, Company C of General Daniel Harvey Hill's Division - November 8, 1862.” Letters (correspondence). Civil War Collection, 1862. Box 5, Folder 14. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/419s1rn9qg-cor.