MLA
Weaver, Benjamin Putnam. Letter from Captain Benjamin Putnam Weaver (Near Reedsville, Tennessee) to His Wife, Jenny. Weaver Served in the 42nd Georgia Infantry - December 9, 1862 (Typescript). 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7, Folder 15. https://digital.library.emory.edu/purl/27312jm752-cor.
APA, 6th edition
Weaver, B. P. (1862). Letter from Captain Benjamin Putnam Weaver (Near Reedsville, Tennessee) to his wife, Jenny. Weaver served in the 42nd Georgia Infantry - December 9, 1862 (typescript) (Box 7, Folder 15) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/27312jm752-cor.
Chicago
Weaver, Benjamin Putnam. “Letter from Captain Benjamin Putnam Weaver (Near Reedsville, Tennessee) to His Wife, Jenny. Weaver Served in the 42nd Georgia Infantry - December 9, 1862 (Typescript).” Letters (correspondence). Civil War Collection, 1862. Box 7, Folder 15. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/27312jm752-cor.