Johnson, Burke <br/><br/>
Educational research : quantitative,qualitative and mixed approaches / 
Johnson, Burke. 
 - 5th ed. 
 - California:  Sage publications, inc.,  2014. 
 - xxviii, 712p;25cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9781452244402 
<br/><br/><label>Dewey Class. No.: </label>370.72 JOH