Educational research :  quantitative, qualitative, and mixed approaches / 
R. Burke Johnson, Larry Christensen 
 - Sixth Edition International Student Edition 
 - xxvi, 709 pages :  illustrations ;  25 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781506386591 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Research