Cresswell, John W. <br/><br/>
Designing and conduction mixed method research / 
John W. Creswell, Vicki L. Plano Clark. 
 - California ;  Sage Publications ,  2007 
 - 275 p.;  ill.  23 cm. 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>1412927919 9781412927925 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research--Methodology<br/>Research--Evaluation