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.10, Health Communications, Inc.
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.25, Health Communications, Inc.