Speech at Loyola College Alumni Banquet, Baltimore, Maryland, on February 18, 1958. "John F. Kennedy Quotations: Profiles in Courage Quotations", www.jfklibrary.org.
Mercy Otis Warren (1805). “History of the Rise, Progress and Termination of the American Revolution: Interspersed with Biographical, Political and Moral Observations. In Three Volumes”, p.22