MLA
Miller, Kelly, 1863-1939. Letter to William H. Scott, Sr. from Kelly Miller, February 6, 1910. February 6, 1910. William H. Scott Family Papers, 1848-1982. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/460qrfj85h-cor.
APA, 6th edition
Miller, Kelly, 1863-1939. (February 6, 1910)[Letter to William H. Scott, Sr. from Kelly Miller, February 6, 1910]. William H. Scott Family Papers, 1848-1982, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/460qrfj85h-cor.
Chicago
Miller, Kelly, 1863-1939, Letter to William H. Scott, Sr. from Kelly Miller, February 6, 1910, February 6, 1910, William H. Scott Family Papers, 1848-1982, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/460qrfj85h-cor.