Creswell, John W., <br/><br/>
Research design : qualitative, quantitative, and mixed methods approaches. 

 - 5th ed. 
 - London :  Sage Publication,  2018. 
 - xxv, 275 p. ; 
<br/><br/>Includes bibliographical references and indexes. 
<br/><br/><label>ISBN: </label>9781506386706 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences<br/>Social sciences
<br/><br/><label>Dewey Class. No.: </label>300.72 CRE