Speech in Ottawa on January 10, 1946. "Eisenhower Speaks: Dwight D. Eisenhower in His Messages and Speeches". Book edited by Rudolph L. Treuenfels, 1948.
Mark Twain (2014). “Mark Twain on Common Sense: Timeless Advice and Words of Wisdom from America's Most-Revered Humorist”, p.53, Skyhorse Publishing, Inc.
Thomas F. Jackson, Martin Luther King (Jr.) (2007). “From Civil Rights to Human Rights: Martin Luther King, Jr., and the Struggle for Economic Justice”, p.319, University of Pennsylvania Press