MLA
Letter from Unknown Individual to "My Dear Sister Martha" - February 25, 1865 (Typescript). 1865. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 2. https://digital.library.emory.edu/purl/392g79cppc-cor.
APA, 6th edition
Letter from unknown individual to "My Dear Sister Martha" - February 25, 1865 (typescript) (Box 2, Folder 2). (1865). [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/392g79cppc-cor.
Chicago
“Letter from Unknown Individual to ‘My Dear Sister Martha’ - February 25, 1865 (Typescript).” Letters (correspondence). Civil War Collection, 1865. Box 2, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/392g79cppc-cor.