1. The SAGE Handbook of Qualitative Research;Denzin,1994
2. The SAGE Handbook of Qualitative Research;Denzin,2000
3. The SAGE Handbook of Qualitative Research;Denzin,2005
4. Introduction: the discipline and practice of qualitative research;Denzin,2011
5. Qualitative Inquiry & Research Design: Choosing Among the Five Approaches;Creswell,2013