Creswell John W <br/><br/>
Qualitative inquiry and research design: Choosing among five approaches 

 - 2nd 
 - London, UK  Sage Publications   2007 
 - xvii,395p. 
<br/><br/><label>ISBN: </label>978-1-4129-1607-3 
<br/><br/><label>Source: </label>Reference