CRESWELL John W. <br/><br/>
Research design :  qualitative, quantitative, and mixed methods approaches / 
John W. Creswell. 
 - 4th ed. 
 - Thousand Oaks, California :  Sage Publications,   2013. 
 - xxix, 273 pages : charts ; 26 cm. 
<br/><br/> Previous edition: c2009. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781452226095 (hbk.) :  76.00 GBP 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SOCIAL SCIENCES -- RESEARCH -- METHODOLOGY<br/>SOCIAL SCIENCES -- STATISTICAL METHODS