Cresswell, John W. <br/><br/>
Research design :  qualitative, quantitative, and mixes methods approaches / 
John W. Creswell 
 - 4th ed. 
 - Thousand Oaks :  California :  Sage,  2014. 
 - xxix, 273p. :  col. ill.;  26cm. 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Methodology--Research<br/>Social sciences--Statistical methods
<br/><br/><label>Dewey Class. No.: </label>23