Albert Einstein (2016). “The Albert Einstein Collection: Essays in Humanism, The Theory of Relativity, and The World As I See It”, p.168, Open Road Media
Immanuel Wallerstein (2011). “The Modern World-System I: Capitalist Agriculture and the Origins of the European World-Economy in the Sixteenth Century, With a New Prologue”, p.357, Univ of California Press
Jonathan Mayhew (1750). “A Discourse Concerning Unlimited Submission and Non-resistance to the Higher Powers: With Some Reflections on the Resistance Made to King Charles I, and on the Anniversary of His Death: in which the Mysterious Doctrine of the Princes' Saintship and Martyrdom is Unriddled: the Substance of which was Delivered in a Sermon Preached in the West Meeting-house in Boston the Lord's-day After the 30th of January, 1749/50...”, p.39