MLA
Letter from Green B. Woody's Brother-in-Law (Mitchell County, North Carolina) to Green B. Woody - February 15, 1863. 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7, Folder 41. https://digital.library.emory.edu/purl/552w3r23b6-cor.
APA, 6th edition
Letter from Green B. Woody's brother-in-law (Mitchell County, North Carolina) to Green B. Woody - February 15, 1863 (Box 7, Folder 41). (1863). [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/552w3r23b6-cor.
Chicago
“Letter from Green B. Woody's Brother-in-Law (Mitchell County, North Carolina) to Green B. Woody - February 15, 1863.” Letters (correspondence). Civil War Collection, 1863. Box 7, Folder 41. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/552w3r23b6-cor.