"El Ingenioso Hidalgo Don Quijote de la Mancha (The Ingenious Nobleman Sir Quixote of La Mancha)". Book by Miguel de Cervantes (Part II, Book III, Chapter 3), 1620.
Jean-Jacques Rousseau (2012). “The Major Political Writings of Jean-Jacques Rousseau: The Two "Discourses" and the "Social Contract"”, p.27, University of Chicago Press
"The Closing of the American Mind: How higher education has failed democracy and impoverished the souls of today's students". Book by Allan Bloom, 1987.
George Washington (1860). “Recollections and private memoirs of Washington by his adopted son George Washington with a memoir of the author by his daughter; and illustrative and explanatory notes by Benson J. Loosing: With illustrations”, p.152
"Ursula K. Le Guin talks to Michael Cunningham about genres, gender, and broadening fiction". Interview with Michael Cunningham, electricliterature.com. April 1, 2016.
Speech at the 5th Congress of the Polish United Workers Party (12 November 1968), quoted in "The Rise and Fall of the Brezhnev Doctrine in Soviet Foreign Policy" by Matthew J. Ouimet, 2003.