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

 - 5th ed. 
 - London; Los Angeles:  Sage,  2018. 
 - xxv,275p.; 26cm 
<br/><br/>Y 
<br/><br/><label>ISBN: </label>9781506386768 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1.Social sciences-research methodology.2.Social sciences -statistical methods.3. Social service-methodology.
<br/><br/><label>Subjects--Index Terms: </label>Y 
<br/><br/><label>LC Class. No.: </label>H62  / .C74