Lowell Hayes Harrison & James C. Klotter (1997). A new history of Kentucky. University Press of Kentucky. p. 180. ISBN0813126215. In 1866, Kentucky refused to ratify the Thirteenth Amendment. It did ratify it in 1976.
Quisenberry, A. C. "Kentucky Union Troops in the Civil War". Register of the Kentucky State Historical Society, vol. 18, no. 54, 1920, pp. 13–18. JSTOR23369562.
Annie Heloise Abel, "The Indians in the Civil War", American Historical Review Vol. 15, No. 2 (Jan. 1910), pp. 281–296. JSTOR1838335
Roy P. Basler; Marion Dolores Pratt; Lloyd A. Dunlap, assistant, eds. (2001). "Collected Works of Abraham Lincoln. Volume 4". University of Michigan Digital Library Production Services. p. 533. Retrieved May 28, 2011.