MLA
Mackall, William W. (William Whann), 1817-1891. Military order from William W. Mackall, Chief of Staff for the Army of Tennessee to Confederate General Patrick Cleburne. May 11, 1864. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn401-cor.
APA, 6th edition
Mackall, William W. (William Whann), 1817-1891. (May 11, 1864)[Military order from William W. Mackall, Chief of Staff for the Army of Tennessee to Confederate General Patrick Cleburne]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn401-cor.
Chicago
Mackall, William W. (William Whann), 1817-1891, Military order from William W. Mackall, Chief of Staff for the Army of Tennessee to Confederate General Patrick Cleburne, May 11, 1864, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn401-cor.