Henry David Thoreau (2014). “Citizen Thoreau: Walden, Civil Disobedience, Life Without Principle, Slavery in Massachusetts, A Plea for Captain John Brown”, p.39, Graphic Arts Books
"The Reaction in Germany" by Mikhail Bakunin (October 1842), signed "Jules Elysard"; as quoted in Mikhail Bakunin "Bakunin on Anarchism" edited and translated by Sam Dolgoff, www.marxists.org. 1971.