1. (1979) Mind and Nature: A Necessary Unity. Toronto and New York: Bantam Books.
2. Three Contributions of a Spiritual Perspective to Counseling, Psychotherapy, and Behavior Change
3. and (1992) Psychlogical Testing and Assessment: an Introduction to Tests and Measurements, 2nd edn. Mountain View, CA: Mayfield Publishing Company.
4. (1991) Theory and Practice of Counseling and Psychotherapy, 4th edn. Pacific Grove, CA: Brooks/Cole Publishing Company.