MLA
Hall, Lynza. Letter from Lynza Hall (Camp Randolph, Gordon County, Georgia) to His Brother - September 7, 1862 (Typescript). 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 3, Folder 44. https://digital.library.emory.edu/purl/310jsxktmw-cor.
APA, 6th edition
Hall, L. (1862). Letter from Lynza Hall (Camp Randolph, Gordon County, Georgia) to his brother - September 7, 1862 (typescript) (Box 3, Folder 44) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/310jsxktmw-cor.
Chicago
Hall, Lynza. “Letter from Lynza Hall (Camp Randolph, Gordon County, Georgia) to His Brother - September 7, 1862 (Typescript).” Letters (correspondence). Civil War Collection, 1862. Box 3, Folder 44. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/310jsxktmw-cor.