MLA
Keahey, George N. Letter from George N. Keahey (Fort Morgan, Alabama) to Miss Maryan (Mary) Keahey - November 21, 1863 (Typescript). 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 4, Folder 24. https://digital.library.emory.edu/purl/7547pvmdw9-cor.
APA, 6th edition
Keahey, G. N. (1863). Letter from George N. Keahey (Fort Morgan, Alabama) to Miss Maryan (Mary) Keahey - November 21, 1863 (typescript) (Box 4, Folder 24) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7547pvmdw9-cor.
Chicago
Keahey, George N. “Letter from George N. Keahey (Fort Morgan, Alabama) to Miss Maryan (Mary) Keahey - November 21, 1863 (Typescript).” Letters (correspondence). Civil War Collection, 1863. Box 4, Folder 24. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7547pvmdw9-cor.