MLA
Elliot, Stephens. Letter from Reverend Stephens Elliot Regarding the Obituary of a Mutual Friend - July 1864. 1864. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 3, Folder 3. https://digital.library.emory.edu/purl/815p8cz9z2-cor.
APA, 6th edition
Elliot, S. (1864). Letter from Reverend Stephens Elliot regarding the obituary of a mutual friend - July 1864 (Box 3, Folder 3) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/815p8cz9z2-cor.
Chicago
Elliot, Stephens. “Letter from Reverend Stephens Elliot Regarding the Obituary of a Mutual Friend - July 1864.” Letters (correspondence). Civil War Collection, 1864. Box 3, Folder 3. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/815p8cz9z2-cor.