Judith Orloff (2004). “Positive Energy: 10 Extraordinary Prescriptions for Transforming Fatigue, Stress, and Fear into Vibrance, Strength, and Love”, p.26, Harmony
David Deida (2008). “The Way of the Superior Man: A Spiritual Guide to Mastering the Challenges of Women, Work, and Sexual Desire: Easyread Super Large 24pt Edition”, p.8, 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 Super Large 24pt Edition”, p.8, ReadHowYouWant.com