1. Comprehensive end-of-life care and physician-assisted suicide. A position statement;American Academy of Hospice and Palliative Medicine,1997
2. Withholding and/or withdrawing life-sustaining treatment: Position statement,1989
3. Decisions near the end of life;Journal of the American Medical Association,1992
4. Code of medical ethics: Current opinions with annotations,1997
5. Code for nurses with interpretive statements,1985