MLA
Lindsey, J. B. Letter from J. B. Lindsey to "Dear Father" - January 22, 1863. 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 4, Folder 48. https://digital.library.emory.edu/purl/26663xsk4z-cor.
APA, 6th edition
Lindsey, J. B. (1863). Letter from J. B. Lindsey to "Dear Father" - January 22, 1863 (Box 4, Folder 48) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/26663xsk4z-cor.
Chicago
Lindsey, J. B. “Letter from J. B. Lindsey to ‘Dear Father’ - January 22, 1863.” Letters (correspondence). Civil War Collection, 1863. Box 4, Folder 48. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/26663xsk4z-cor.