MLA
Avison, Oliver R., 1860-1956. Letter from Oliver R. Avison to Yun Ch'i-ho - July 5, 1908. July 5, 1908. Yun Ch‘i-ho Papers. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/484mkkwjf0-cor.
APA, 6th edition
Avison, Oliver R., 1860-1956. (July 5, 1908)[Letter from Oliver R. Avison to Yun Ch'i-ho - July 5, 1908]. Yun Ch‘i-ho Papers, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/484mkkwjf0-cor.
Chicago
Avison, Oliver R., 1860-1956, Letter from Oliver R. Avison to Yun Ch'i-ho - July 5, 1908, July 5, 1908, Yun Ch‘i-ho Papers, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/484mkkwjf0-cor.