MLA
Chattin, Thomas J. W. Letter from Thomas J. W. Chattin (Cartersville) to "Miss M.F. Chattin." Chattin Served in Capt. Craven Smith's Regiment, Partisan Rangers - May 22, 1862. 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 15. https://digital.library.emory.edu/purl/822h70rzwm-cor.
APA, 6th edition
Chattin, T. J. W. (1862). Letter from Thomas J. W. Chattin (Cartersville) to "Miss M.F. Chattin." Chattin served in Capt. Craven Smith's Regiment, Partisan Rangers - May 22, 1862 (Box 2, Folder 15) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/822h70rzwm-cor.
Chicago
Chattin, Thomas J. W. “Letter from Thomas J. W. Chattin (Cartersville) to ‘Miss M.F. Chattin." Chattin Served in Capt. Craven Smith's Regiment, Partisan Rangers - May 22, 1862.” Letters (correspondence). Civil War Collection, 1862. Box 2, Folder 15. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/822h70rzwm-cor.