MLA
Cutter, William Richard, 1847-1918. Letter to William H. Scott, Sr. from William R. Cutter, June 12, 1902. June 12, 1902. William H. Scott Family Papers, 1848-1982. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/945cc2fsh4-cor.
APA, 6th edition
Cutter, William Richard, 1847-1918. (June 12, 1902)[Letter to William H. Scott, Sr. from William R. Cutter, June 12, 1902]. William H. Scott Family Papers, 1848-1982, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/945cc2fsh4-cor.
Chicago
Cutter, William Richard, 1847-1918, Letter to William H. Scott, Sr. from William R. Cutter, June 12, 1902, June 12, 1902, William H. Scott Family Papers, 1848-1982, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/945cc2fsh4-cor.