1. L. Araujo (1995 ) Designing and refining hierarchical coding frames . InComputer-Aided Qualitative Data Analysis: Theory, Methods and Practice(Kelle U., Prein G. & Bird K. eds), Sage, London, pp. 96-104.
2. R.S. Barbour, and J. Kitzinger (eds) (1999 )Developing Focus Group Research. Sage, London.
3. B.S. Barnum (1996 )Spirituality in Nursing. Springer Publishing Co., New York.
4. D.G. Barrett (1996 ) Religion: World religious statistics . InEncyclopedia Britannica Book of the Year, Encyclopedia Britannica, Chicago, p. 298.