Jack Lalanne (2008). “Fiscal Fitness: 8 Steps to Wealth & Health from America's Leaders of Fitness and Finance: Easyread Super Large 24pt Edition”, p.175, ReadHowYouWant.com
David Deida (2008). “The Way of the Superior Man: A Spiritual Guide to Mastering the Challenges of Women, Work, and Sexual Desire: Easyread Edition”, p.3, ReadHowYouWant.com