MLA
O'Keefe, D. C. Letter Written by D. C. O'Keefe (Atlanta, Georgia), Surgeon in Charge of the Institute Hospital Recommending F. D. Bloodworth, 2nd Georgia Battalion, Company D, for Duty - January 18, 1864 (Photocopy). 1864. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 32. https://digital.library.emory.edu/purl/81289320fc-cor.
APA, 6th edition
O'Keefe, D. C. (1864). Letter written by D. C. O'Keefe (Atlanta, Georgia), Surgeon in charge of the Institute Hospital recommending F. D. Bloodworth, 2nd Georgia Battalion, Company D, for duty - January 18, 1864 (photocopy) (Box 1, Folder 32) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/81289320fc-cor.
Chicago
O'Keefe, D. C. “Letter Written by D. C. O'Keefe (Atlanta, Georgia), Surgeon in Charge of the Institute Hospital Recommending F. D. Bloodworth, 2nd Georgia Battalion, Company D, for Duty - January 18, 1864 (Photocopy).” Letters (correspondence). Civil War Collection, 1864. Box 1, Folder 32. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/81289320fc-cor.