Wayne W. Dyer (2009). “The Invisible Force: 365 Ways to Apply the Power of Intention to Your Life: Easyread Large Bold Edition”, p.236, ReadHowYouWant.com
Words inscribed upon the mantle of gonfalonier given to his son Cesare Borgia on March 29, 1499. "The Life of Cesare Borgia". Book by Rafael Sabatini, Chapter IV: "Gonfalonier of the Church", 1912.