Vaclav Havel, John Keane (2016). “The Power of the Powerless: Citizens Against the State in Central Eastern Europe: Citizens Against the State in Central Eastern Europe”, p.78, Routledge
Joseph Butler, Samuel Hallifax (1828). “The Works of the Right Reverend Father in God, Joseph Butler: To which is Prefixed, an Account of the Character and Writings of the Author”
Samuel Richardson (1755). “A collection of the moral and instructive sentiments, maxims, cautions, and reflexions, contained in the histories of Pamela, Clarissa, and Sir Charles Grandison: Digested under proper heads, with references to the volume, ...”, p.27
Albert Einstein (2000). “Albert Einstein in his own words in two complete books: Relativity-the special and general theory; Out of my later years-the scientist, philosopher and man portrayed through his own words”
William Cobbett (1829). “Advice to Young Men, and, incidentally, to Young Women, in the middle and higher ranks of life. In a series of letters, etc”, p.364