Creswell, John W. <br/><br/>
Research design :  qualitative, quantitative, and mixed methods approaches / 
John W. Creswell 
 - 3rd ed. 
 - Thousand Oaks, Calif. :  Sage Publications,  2009 
 - xxix, 260 p. ;  26 cm. 
<br/><br/>Includes bibliographical references (p. 237-245) and indexes 
<br/><br/><label>ISBN: </label>9781412965576 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research--Methodology<br/>Social sciences--Statistical methods