Judith M. Bardwick (1995). “Danger in the Comfort Zone: From Boardroom to Mailroom--how to Break the Entitlement Habit That's Killing American Business”, p.14, AMACOM Div American Mgmt Assn
Friedrich Wilhelm Nietzsche (2016). “The Will to Power, Book I to IV: An Attempted Transvaluation of all Values (Complete)”, p.64, Library of Alexandria