MLA
L.[?], Burrows J. Letter to Fannie Keen from J. L. Burrows[?] (Name Torn off) - April 9, 1863. 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 4, Folder 25. https://digital.library.emory.edu/purl/883xsj3w02-cor.
APA, 6th edition
L.[?], B. J. (1863). Letter to Fannie Keen from J. L. Burrows[?] (Name torn off) - April 9, 1863 (Box 4, Folder 25) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/883xsj3w02-cor.
Chicago
L.[?], Burrows J. “Letter to Fannie Keen from J. L. Burrows[?] (Name Torn off) - April 9, 1863.” Letters (correspondence). Civil War Collection, 1863. Box 4, Folder 25. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/883xsj3w02-cor.