"Breckinridge, John Cabell". Biographical Directory of the United States Congress. United States Congress. Archived from the original on September 3, 2019. Retrieved November 8, 2012.
Richard Nelson Current, ed. (1993). "John C. Breckinridge". Encyclopedia of the Confederacy. New York City: Simon & Schuster. Retrieved November 20, 2012.
"Breckinridge, John Cabell". Biographical Directory of the United States Congress. United States Congress. Archived from the original on September 3, 2019. Retrieved November 8, 2012.