MLA
Harper, Henry C. Civil War Diary of Henry C. Harper Which Also Includes Several Poems Written by Harper, 1861-1863. Harper Served in Company E of the 8th Georgia Infantry Regiment. 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 3, Folder 51. https://digital.library.emory.edu/purl/235gb5mmms-cor.
APA, 6th edition
Harper, H. C. (1861). Civil War diary of Henry C. Harper which also includes several poems written by Harper, 1861-1863. Harper served in Company E of the 8th Georgia Infantry Regiment (Box 3, Folder 51) [Diaries]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/235gb5mmms-cor.
Chicago
Harper, Henry C. “Civil War Diary of Henry C. Harper Which Also Includes Several Poems Written by Harper, 1861-1863. Harper Served in Company E of the 8th Georgia Infantry Regiment.” Diaries. Civil War Collection, 1861. Box 3, Folder 51. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/235gb5mmms-cor.