1. 2T. Beauchamp, and J. Childress (1994 )Principles of Biomedical Ethics. 4th edn. Oxford University Press, Oxford.
2. 3I. Berlin (1958 )Two Concepts of Liberty in Four Essays on Liberty. Oxford University Press, London.
3. A concept analysis of consent
4. 5C . (Adult: Refusal of treatment) (1994 ) 1Weekly Law Reports290.