Robin Sharma (2006). “The Greatness Guide: One of the World's Most Successful Coaches Shares His Secrets for Personal and Business Mastery”, p.23, Jaico Publishing House
Alexander Pope, William Roscoe (1847). “The works of Alexander Pope, esq., with notes and illustrations, by himself and others. To which are added, a new life of the author, an Estimate of his poetical character and writings, and occasional remarks by William Roscoe, esq”, p.379