Jack Canfield, Mark Victor Hansen, Amy Newmark (2013). “Chicken Soup for the Soul: Reader's Choice 20th Anniversary Edition: The Chicken Soup for the Soul Stories that Changed Your Lives”, p.13, Simon and Schuster
Jack Canfield, D. D. Watkins (2007). “Jack Canfield's Key to Living the Law of Attraction: A Simple Guide to Creating the Life of Your Dreams”, p.11, Health Communications, Inc.