Gay, L.R. <br/><br/>
Educational research:  Competencies for analysis 
Gay, L.R. 
 - 9th ed 
 - New Jersey  Pearson  2009 
 - xvi, 618p.  ill,   26cm 
<br/><br/><label>ISBN: </label>9780132338776 
<br/><br/><label>Dewey Class. No.: </label>370.72/  / GAY