MLA
Walker, Leroy Pope, 1817-1884. Document signed by Confederate Secretary of War, LeRoy Pope Walker (Montgomery, Alabama), appointing William Duncan assistant surgeon at Fort Jackson in Georgia. May 16, 1861. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/948sbcc3hv-cor.
APA, 6th edition
Walker, Leroy Pope, 1817-1884. (May 16, 1861)[Document signed by Confederate Secretary of War, LeRoy Pope Walker (Montgomery, Alabama), appointing William Duncan assistant surgeon at Fort Jackson in Georgia]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/948sbcc3hv-cor.
Chicago
Walker, Leroy Pope, 1817-1884, Document signed by Confederate Secretary of War, LeRoy Pope Walker (Montgomery, Alabama), appointing William Duncan assistant surgeon at Fort Jackson in Georgia, May 16, 1861, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/948sbcc3hv-cor.