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>9781412965569 (hbk.)  RM1029.80 141296556X (cloth) 9781412965576 (pbk.) 1412965578 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research--Methodology.<br/>Social sciences--Statistical methods.