Creswell, John W. <br/><br/>
Research design :  qualitative, quantitative, and mixed methods approches / 
John W. Creswell. 
 - 5th  ed. 
 - London :  SAGE,  2018 
 - xxv, 275p. 
<br/><br/><label>ISBN: </label>1506386768 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research--Methodology.<br/>Social sciences--Statistical methods.
<br/><br/><label>LC Class. No.: </label>H62  / .C72 2018