MLA
Smith, Hallie Claire. Letter from Hallie Claire Smith to Dr. G. H. Jack of Emory University about Donating Civil War Materials Including a Letter from J. B. Strong, to the Emory University Library - September 17, 1934. 1934. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 38. https://digital.library.emory.edu/purl/95269p8dp7-cor.
APA, 6th edition
Smith, H. C. (1934). Letter from Hallie Claire Smith to Dr. G. H. Jack of Emory University about donating Civil War materials including a letter from J. B. Strong, to the Emory University Library - September 17, 1934 (Box 6, Folder 38) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/95269p8dp7-cor.
Chicago
Smith, Hallie Claire. “Letter from Hallie Claire Smith to Dr. G. H. Jack of Emory University about Donating Civil War Materials Including a Letter from J. B. Strong, to the Emory University Library - September 17, 1934.” Letters (correspondence). Civil War Collection, 1934. Box 6, Folder 38. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/95269p8dp7-cor.