MLA
Munns, James, Jr. Letters and Diary of James Munn Jr., 1st Lieutenant in 29th Iowa Volunteer Infantry, Company D. The Entries in the Diary Begin February 24, 1863 and End August 11, 1863 and Letters Are Addressed to Members of His Family and Military Officers - 1857-1864 (Typescript). 1856. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 20, Folder 5. https://digital.library.emory.edu/purl/767wm37r20-cor.
APA, 6th edition
Munns, J., Jr. (1856). Letters and diary of James Munn Jr., 1st Lieutenant in 29th Iowa Volunteer Infantry, Company D. The entries in the diary begin February 24, 1863 and end August 11, 1863 and letters are addressed to members of his family and military officers - 1857-1864 (typescript) (Box 20, Folder 5) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/767wm37r20-cor.
Chicago
Munns, James, Jr. “Letters and Diary of James Munn Jr., 1st Lieutenant in 29th Iowa Volunteer Infantry, Company D. The Entries in the Diary Begin February 24, 1863 and End August 11, 1863 and Letters Are Addressed to Members of His Family and Military Officers - 1857-1864 (Typescript).” Letters (correspondence). Civil War Collection, 1856. Box 20, Folder 5. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/767wm37r20-cor.