References
- Compliance in Health Care, R. Haynes Brian, D. Taylor Wayne, L. Sackett David. The Johns Hopkins University Press. 1979
- Sloane Bruce R., Staples Fred R., Cristol Allan H., Yorkston Neil J., Whipple Katherine. Psychotherapy versus Behaviour Therapy, 2nd ed. Harvard University Press, Cambridge, Massachusetts and LondonEngland 1976