1. 1J. Appleby, K. Walshe, and C. Ham (1995 ) Acting on the Evidence .Research Paper 17. NAHAT, Birmingham.
2. 2R. Audi (1998 )Epistemology: A Contemporary Introduction to the Theory of Knowledge. Routledge, London.
3. Symbolic interactionism as a theoretical perspective for multiple method research
4. 4D.Y. Bockopp, and A. Hastings-Tolsma (1995 )Fundamentals of Nursing Research, 2nd edn. Jones and Bartlett, Boston.
5. 5A. Briggs (1972 )Report of the Committee on Nursing.HMSO, London.