MLA
Letter from an Unknown Soldier (Atlanta, Georgia) to "Dear Wife" - July 2, 1861. 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 65. https://digital.library.emory.edu/purl/296wwpzh9p-cor.
APA, 6th edition
Letter from an unknown soldier (Atlanta, Georgia) to "Dear Wife" - July 2, 1861 (Box 6, Folder 65). (1861). [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/296wwpzh9p-cor.
Chicago
“Letter from an Unknown Soldier (Atlanta, Georgia) to ‘Dear Wife’ - July 2, 1861.” Letters (correspondence). Civil War Collection, 1861. Box 6, Folder 65. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/296wwpzh9p-cor.