1. How and why are some therapists better than others?: understanding therapist effects Washington, DC : American Psychological Association, [2017] COUN300 CP524
2. Counselling and psychotherapy research. Rugby, UK : British Association for Counselling and Psychotherapy, 2001- COUN300 SW526 SW421 COUN110 COUN200 CP602 CP605 CP618 CP616 CP507 CP522
