Friedrich Nietzsche, Maudemarie Clark, Brian Leiter (1997). “Nietzsche: Daybreak: Thoughts on the Prejudices of Morality”, p.59, Cambridge University Press
Trent Lott, Tom Daschle, Jon Sternfeld (2016). “Crisis Point: Why We Must – and How We Can – Overcome Our Broken Politics in Washington and Across America”, p.138, Bloomsbury Publishing USA