1. Haley, Jay,Strategies of Psychotherapy, New York: Grune & Stratton, Inc., 1963.
2. Kaiser, Hellmuth, “The Problem of Responsibility in Psychotherapy.”Psychiatry, August, 1955; also included in Fierman, Louis B. ed.,Effective Psychotherapy: The Contribution of Hellmuth Kaiser, New York: The Free Press, 1965.
3. May, Rollo,Man's Search for Himself, New York: W. W. Norton and Company, 1953.