MLA
Gibbs, Nellie Tracy. Letter from Nellie Tracy Gibbs[?] to Keith J. Reach (Savannah, Georgia) Regarding the Flag Supplied by Hugh Sheddon to Fly over the Grave of Confederate General Thomas “Stonewall” Jackson - September 7, 1923. 1923. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 10, Folder 4. https://digital.library.emory.edu/purl/105s7h45m9-cor.
APA, 6th edition
Gibbs, N. T. (1923). Letter from Nellie Tracy Gibbs[?] to Keith J. Reach (Savannah, Georgia) regarding the flag supplied by Hugh Sheddon to fly over the grave of Confederate general Thomas “Stonewall” Jackson - September 7, 1923 (Box 10, Folder 4) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/105s7h45m9-cor.
Chicago
Gibbs, Nellie Tracy. “Letter from Nellie Tracy Gibbs[?] to Keith J. Reach (Savannah, Georgia) Regarding the Flag Supplied by Hugh Sheddon to Fly over the Grave of Confederate General Thomas ‘Stonewall’ Jackson - September 7, 1923.” Letters (correspondence). Civil War Collection, 1923. Box 10, Folder 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/105s7h45m9-cor.