MLA
Steward, Frank R. Negro Officers in the Army, Letter to the Editor by Frank R. Steward, January 8, 1902. 1902. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 10. https://digital.library.emory.edu/purl/6386hdr98q-cor.
APA, 6th edition
Steward, F. R. (1902). Negro Officers in the Army, Letter to the Editor by Frank R. Steward, January 8, 1902 (Box 1, Folder 10) [Clippings (information artifacts)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6386hdr98q-cor.
Chicago
Steward, Frank R. “Negro Officers in the Army, Letter to the Editor by Frank R. Steward, January 8, 1902.” Clippings (information artifacts). William H. Scott Family Papers, 1848-1982, 1902. Box 1, Folder 10. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6386hdr98q-cor.