MLA
Stevens, Durham White, 1851-1908. Letter from Durham White Stevens to Yun Ch'i-ho - May 11, 1906. May 11, 1906. Yun Ch‘i-ho Papers. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0106wwq0ng-cor.
APA, 6th edition
Stevens, Durham White, 1851-1908. (May 11, 1906)[Letter from Durham White Stevens to Yun Ch'i-ho - May 11, 1906]. Yun Ch‘i-ho Papers, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0106wwq0ng-cor.
Chicago
Stevens, Durham White, 1851-1908, Letter from Durham White Stevens to Yun Ch'i-ho - May 11, 1906, May 11, 1906, Yun Ch‘i-ho Papers, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0106wwq0ng-cor.