MLA
Jones, Lewis J. Letter from Lewis L. Jones (Camp Cumberland, Clairborne County, Tennessee) to His Wife, Anna. Jones' Home Was in Morgan County, Tennessee, and He Served in the 1st Tennessee Infantry Regiment (Union) - August 10, 1862. 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 19, Folder 40. https://digital.library.emory.edu/purl/023vt4b9jv-cor.
APA, 6th edition
Jones, L. J. (1862). Letter from Lewis L. Jones (Camp Cumberland, Clairborne County, Tennessee) to his wife, Anna. Jones' home was in Morgan County, Tennessee, and he served in the 1st Tennessee Infantry Regiment (Union) - August 10, 1862 (Box 19, Folder 40) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/023vt4b9jv-cor.
Chicago
Jones, Lewis J. “Letter from Lewis L. Jones (Camp Cumberland, Clairborne County, Tennessee) to His Wife, Anna. Jones' Home Was in Morgan County, Tennessee, and He Served in the 1st Tennessee Infantry Regiment (Union) - August 10, 1862.” Letters (correspondence). Civil War Collection, 1862. Box 19, Folder 40. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/023vt4b9jv-cor.