MLA
Grant, Ulysses S. (Ulysses Simpson), 1822-1885. Official copy of telegram from General of the Army Ulysses S. Grant (Washington, D.C.) to Major General Phillip H. Sheridan informing him of the Act of Congress "to provide for the more efficient government of the rebel states" - March 9, 1867. March 9, 1867. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/781jh9w20j-cor.
APA, 6th edition
Grant, Ulysses S. (Ulysses Simpson), 1822-1885. (March 9, 1867)[Official copy of telegram from General of the Army Ulysses S. Grant (Washington, D.C.) to Major General Phillip H. Sheridan informing him of the Act of Congress "to provide for the more efficient government of the rebel states" - March 9, 1867]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/781jh9w20j-cor.
Chicago
Grant, Ulysses S. (Ulysses Simpson), 1822-1885, Official copy of telegram from General of the Army Ulysses S. Grant (Washington, D.C.) to Major General Phillip H. Sheridan informing him of the Act of Congress "to provide for the more efficient government of the rebel states" - March 9, 1867, March 9, 1867, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/781jh9w20j-cor.