Creswell,John W. <br/><br/>
Research Design: Qualitative,Quantitative,and Mixed Method Approaches 

 - Fourth Edition 
 - Los Angeles   SAGE Publication  2014 
 - xxv,273p.  ill.;24cm. 
<br/><br/> includes bibliographical reference and subject index 
<br/><br/><label>ISBN: </label>9781452274614 
<br/><br/><label>Subjects--Topical Terms: </label><br/>research design
<br/><br/><label>Dewey Class. No.: </label>001.142