1. Doing a Literature Review in Health and Social Care;Aveyard,2010
2. Critical thinking;Bailin,2003
3. Principles of Professional Studies in Nursing,2007
4. Sampling in qualitative research. Purposeful and theoretical sampling; merging or clear boundaries?;Coyne;Journal of Advanced Nursing,1997
5. CASP - Making Sense of Evidence: 10 Questions to Help You Make Sense of Qualitative Research,2006