MLA
Envelope Addressed to Yun Ch'i-Ho (Songdo, Korea). 1903. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 17, Folder 3. https://digital.library.emory.edu/purl/12683bk4rz-cor.
APA, 6th edition
Envelope addressed to Yun Ch'i-ho (Songdo, Korea) (Box 17, Folder 3). (1903). [Envelopes]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/12683bk4rz-cor.
Chicago
“Envelope Addressed to Yun Ch'i-Ho (Songdo, Korea).” Envelopes. Yun Ch‘i-Ho Papers, 1903. Box 17, Folder 3. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/12683bk4rz-cor.