MLA
Hill, D. H. (Daniel Harvey), 1821-1889. Letter from Confederate General Daniel Harvey Hill (Augusta, Georgia) to Major Norman Smith, regarding need of wagons - February 15, 1865. February 15, 1865. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/28380gb6m1-cor.
APA, 6th edition
Hill, D. H. (Daniel Harvey), 1821-1889. (February 15, 1865)[Letter from Confederate General Daniel Harvey Hill (Augusta, Georgia) to Major Norman Smith, regarding need of wagons - February 15, 1865]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/28380gb6m1-cor.
Chicago
Hill, D. H. (Daniel Harvey), 1821-1889, Letter from Confederate General Daniel Harvey Hill (Augusta, Georgia) to Major Norman Smith, regarding need of wagons - February 15, 1865, February 15, 1865, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/28380gb6m1-cor.