MLA
Davenport, S. V. Letter from S. V. Davenport (Camp near Shelbyville, Tennessee) to Mr. Richard Wheeler (Franklin County, Georgia) - April 14, 1863. 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 48. https://digital.library.emory.edu/purl/989r2281gg-cor.
APA, 6th edition
Davenport, S. V. (1863). Letter from S. V. Davenport (camp near Shelbyville, Tennessee) to Mr. Richard Wheeler (Franklin County, Georgia) - April 14, 1863 (Box 2, Folder 48) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/989r2281gg-cor.
Chicago
Davenport, S. V. “Letter from S. V. Davenport (Camp near Shelbyville, Tennessee) to Mr. Richard Wheeler (Franklin County, Georgia) - April 14, 1863.” Letters (correspondence). Civil War Collection, 1863. Box 2, Folder 48. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/989r2281gg-cor.