Osmer & Bridgers 2018. Osmer, Richard; Bridgers, Lynn (2018) [2015]. "James Fowler". Christian Educators of the 20th Century. La Mirada, California: Biola University. Retrieved August 27, 2020.
Downs 1994, p. 114; Osmer & Bridgers 2018. Downs, Perry G. (1994). Teaching for Spiritual Growth: An Introduction to Christian Education. Grand Rapids, Michigan: Zondervan Publishing House. ISBN978-0-310-59370-6. Osmer, Richard; Bridgers, Lynn (2018) [2015]. "James Fowler". Christian Educators of the 20th Century. La Mirada, California: Biola University. Retrieved August 27, 2020.