Burke Johnson, Larry Christensen <br/><br/>
Educational research : quantitative, qualitative, and mixed approaches 

 - 3rd ed 
 - Sage, Los Angeles  c2008 
 - xxiv,639p 
<br/><br/><label>ISBN: </label>978-1-4129-5456-3 
<br/><br/><label>Dewey Class. No.: </label>370.78 Joh/Chr