Creswell, John W. <br/><br/>
Research design :  qualitative, quantitative, and mixed method approaches / 
John W. Creswell 
 - 4th ed. (International Student ed.) 
 - Thousand Oaks, CA :  SAGE,  2014 
 - xxix, 273 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781452274614 (pbk.) 9781452226095 (hbk.) 9781452226101 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research--Methodology<br/>Social sciences--Statistical methods