Michel de Montaigne, William Hazlitt (1860). “The Works of Michael de Montaigne: Comprising His Essays, Letters, and Journey Through Germany and Italy”, p.365
Henry David Thoreau (2014). “Citizen Thoreau: Walden, Civil Disobedience, Life Without Principle, Slavery in Massachusetts, A Plea for Captain John Brown”, p.210, Graphic Arts Books
Henry David Thoreau (2014). “Citizen Thoreau: Walden, Civil Disobedience, Life Without Principle, Slavery in Massachusetts, A Plea for Captain John Brown”, p.244, Graphic Arts Books