MLA
Hanvey, George M. Letter by Captain George M. Hanvey to Confederate General Braxton Bragg; Hanvey Served in the 1st Georgia Infantry Regiment (Ramsey's); Later Company A of the 12th Battalion Georgia Light Artillery - May 5, 1861 (Photocopy). 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 3, Folder 49. https://digital.library.emory.edu/purl/4579s4mx5q-cor.
APA, 6th edition
Hanvey, G. M. (1861). Letter by Captain George M. Hanvey to Confederate General Braxton Bragg; Hanvey served in the 1st Georgia Infantry Regiment (Ramsey's); later Company A of the 12th Battalion Georgia Light Artillery - May 5, 1861 (photocopy) (Box 3, Folder 49) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4579s4mx5q-cor.
Chicago
Hanvey, George M. “Letter by Captain George M. Hanvey to Confederate General Braxton Bragg; Hanvey Served in the 1st Georgia Infantry Regiment (Ramsey's); Later Company A of the 12th Battalion Georgia Light Artillery - May 5, 1861 (Photocopy).” Letters (correspondence). Civil War Collection, 1861. Box 3, Folder 49. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4579s4mx5q-cor.