MLA
Williams, George Washington, 1849-1891. A history of the Negro troops in the war of the rebellion, 1861-1865 : preceded by a review of the military services of Negroes in ancient and modern times. 1888. African American Imprints Collection. Emory University. General Libraries. https://digital.library.emory.edu/purl/849t1g1ndp-cor.
APA, 6th edition
Williams, George Washington, 1849-1891. (1888)[A history of the Negro troops in the war of the rebellion, 1861-1865 : preceded by a review of the military services of Negroes in ancient and modern times]. African American Imprints Collection, Emory University. General Libraries. https://digital.library.emory.edu/purl/849t1g1ndp-cor.
Chicago
Williams, George Washington, 1849-1891, A history of the Negro troops in the war of the rebellion, 1861-1865 : preceded by a review of the military services of Negroes in ancient and modern times, 1888, African American Imprints Collection, Emory University. General Libraries. https://digital.library.emory.edu/purl/849t1g1ndp-cor.