Wayne W. Dyer (2009). “The Invisible Force: 365 Ways to Apply the Power of Intention to Your Life: Easyread Super Large 18pt Edition”, p.106, ReadHowYouWant.com
"Christiane Northrup, MD, New York Times Best-Selling Author: Growing Older Mindfully". Interview with Maranda Pleasant, www.marandapleasantmedia.com. January 27, 2015.