MLA
Cafey, H. D. Letter to Captain George M. Hanvey by H. D. Cafey [?] at the Confederate Treasury Department (Photocopy); Hanvey Served in the 1st Georgia Infantry Regiment (Ramsey's); Later Company A of the 12th Battalion Georgia Light Artillery - April 9, 1863 (Photocopy). 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 3, Folder 49. https://digital.library.emory.edu/purl/7719kd52cw-cor.
APA, 6th edition
Cafey, H. D. (1863). Letter to Captain George M. Hanvey by H. D. Cafey [?] at the Confederate Treasury Department (Photocopy); Hanvey served in the 1st Georgia Infantry Regiment (Ramsey's); later Company A of the 12th Battalion Georgia Light Artillery - April 9, 1863 (photocopy) (Box 3, Folder 49) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7719kd52cw-cor.
Chicago
Cafey, H. D. “Letter to Captain George M. Hanvey by H. D. Cafey [?] at the Confederate Treasury Department (Photocopy); Hanvey Served in the 1st Georgia Infantry Regiment (Ramsey's); Later Company A of the 12th Battalion Georgia Light Artillery - April 9, 1863 (Photocopy).” Letters (correspondence). Civil War Collection, 1863. Box 3, Folder 49. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7719kd52cw-cor.