Creswell, John W <br/><br/>
Research design: Qualitative,quantitative, and mixed methods approaches 

 - Third edition 
 - California:  SAGE Publications Inc,  2009 
 - xxix,260p.:  ill  25cm 
<br/><br/><label>ISBN: </label>9781412965576 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research--Methodology<br/>Social sciences--Statistical methods
<br/><br/><label>Dewey Class. No.: </label>300.72 CRE