1. American Medical Association 1996a Code of medical ethics: Current opinions with annotations, 2008-2009 http://www.ama-assn.org/ama/pub/physician-resources/medical-ethics/code-medical-ethics/opinion221.page
2. American Medical Association 1996b Code of medical ethics: Current opinions with annotations, 2008-2009 http://www.ama-assn.org/ama/pub/physician-resources/medical-ethics/code-medical-ethics/opinion2211.shtml
3. American Nurses Association 2013 Position statement on euthanasia, assisted suicide, and aid in dying http://www.nursingworld.org/euthanasiaanddying
4. Bailey , G. 2004 NASW standards for palliative and end of life care http://www.naswdc.org/practice/bereavement/standards/standards0504New.pdf