MLA
Carroll, Jeremiah. Letter from Jeremiah Carroll (Camp near Richmond, Virginia) to Mr. Shuler. Jeremiah Carroll, Served in Company F of the 6th South Carolina Infantry Regiment - May 20, 1862. 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 21. https://digital.library.emory.edu/purl/204rjdfnrj-cor.
APA, 6th edition
Carroll, J. (1862). Letter from Jeremiah Carroll (Camp near Richmond, Virginia) to Mr. Shuler. Jeremiah Carroll, served in Company F of the 6th South Carolina Infantry Regiment - May 20, 1862 (Box 6, Folder 21) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/204rjdfnrj-cor.
Chicago
Carroll, Jeremiah. “Letter from Jeremiah Carroll (Camp near Richmond, Virginia) to Mr. Shuler. Jeremiah Carroll, Served in Company F of the 6th South Carolina Infantry Regiment - May 20, 1862.” Letters (correspondence). Civil War Collection, 1862. Box 6, Folder 21. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/204rjdfnrj-cor.