Socrates, Plato, Aristotle (1967). “Wit and Wisdom of Socrates, Plato, Aristotle: Being a Treasury of Thousands of Glorious, Inspiring and Imperishable Thoughts, Views and Observations of the Three Great Greek Philosophers, Classified Under about Four Hundred Subjects for Comparative Study”
Jack Canfield, Mark Victor Hansen, Amy Newmark (2011). “Chicken Soup for the Soul: Preteens Talk: Inspiration and Support for Preteens from Kids Just Like Them”, p.349, Simon and Schuster