Alexander Hamilton, James Madison, Quentin P. Taylor, John Jay (1998). “The Essential Federalist: A New Reading of the Federalist Papers”, p.145, Rowman & Littlefield
"Federalist No. 48. These Departments Should Not Be So Far Separated as to Have No Constitutional Control Over Each Other" by James Madison, www.congress.gov. February 1, 1788.
John George Nicolay (2008). “A Short Life of Abraham Lincoln: Condensed from Nicolay & Hay's Abraham Lincoln: a History: Easyread Large Edition”, p.56, ReadHowYouWant.com
Alexander Hamilton, James Madison, John Jay (2015). “The Federalist Papers: A Collection of Essays Written in Favour of the New Constitution”, p.49, Coventry House Publishing