1. Beauchamp, T.L. & Childress, J.F. (1994)Principles of Biomedical Ethics. Oxford University Press, New York, 546 pp.
2. Ethical guidelines for epidemiologists
3. Council for International Organizations of Medical Sciences (1993) International ethical guidelines for biomedical research involving human subjects. CIOMS, Geneva, 63 pp.
4. Coughlin, S.S. (ed.) (1995)Ethics in Epidemiology and Clinical Research: Annotated Readings.Epidemiology Resources Inc, Newton Lower Falls, MA, 272 pp.