Mary McLeod Bethune, Audrey Thomas McCluskey, Elaine M. Smith (2001). “Mary McLeod Bethune: Building a Better World : Essays and Selected Documents”, p.23, Indiana University Press
John Henry Newman (1873). “The Idea of a University Defined and Illustrated: I. In Nine Discourses Delivered to the Catholics of Dublin ; [II] In Occasional Lectures and Essays Addressed to the Members of the Catholic University”, p.103
United States. President (1981-1989 : Reagan), United States. President (1981-1989 : Reagan)., Ronald Reagan, United States. Office of the Federal Register (1982). “Ronald Reagan”
Thomas Jefferson (2011). “Jefferson on Freedom: Wisdom, Advice, and Hints on Freedom, Democracy, and the American Way”, p.36, Skyhorse Publishing, Inc.
James Madison (1836). “The Debates in the Several State Conventions on the Adoption of the Federal Constitution: As Recommended by the General Convention at Philadelphia in 1787. Together with the Journal of the Federal Convention, Luther Martin's Letter, Yates's Minutes, Congressional Opinions, Virginia and Kentucky Resolutions of '98-'99, and Other Illustrations of the Constitution”, p.204