1. Rogers C., R.: “Client-Centered Therapy”; (First printed in 1951), Constable, (1995)
2. Rogers C., R.: “On Becoming A Person-A Psychotherapists View of Psychotherapyrd; Constable, (1961)
3. Rogers C., R.: “Freedom to Learn for the 80’s”; Charles E. Merrill Publishing Company, A Bell&Howell Company, (1983)
4. Rogers C., R.: “Die Nicht-Direktive Beratung (Non-Directed Counseling)”; Fischer Taschenbuch Verlag, Frankfurt am Main, 6th Ed., (1985)
5. Berne E.: “Transactional Analysis in Psychotherapy”; New York, (1961)