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

 - 5th ed. 
 - Thousand Oaks :  SAGE,  2018. 
 - xxv, 275p. 
<br/><br/>Includes bibliography references and index 
<br/><br/><label>ISBN: </label>97881506386768 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research--Methodology<br/>Social service--Research--Methodology<br/>Social sciences--Statistical methods
<br/><br/><label>LC Class. No.: </label>WM20