1. Graham, N.O., Quality Trends in Health Care, in Quality in Health Care, edited by N.O. Graham, Aspen Publishers, Gaithersburg, Maryland, 1995, pp. 3–14.
2. Gaucher, E.J., Coffey, R.J., Total Quality in Health Care: from Theory to Practice, Jossey-Bass Publishers, San Francisco, 1993.
3. Codman, E.A., The Product of the Hospital, Surgical Gynaecology and Obstetrics, Vol. 28, 1914, pp. 491–496.
4. Glossary of Terms Commonly Used in Health Care, Prepared by the Academy Health, Suite 701-L, 1801 K St. NW, Washington, D.C., 2004.
5. Graham, N.O., Editor, Quality in Health Care: Theory, Application, and Evolution, Aspen Publishers, Gaithersburg, Maryland, 1995.