Gay L. R. ... ( et. al. )., <br/><br/>
Educational research :  competencies for analysis and applications / 
by L. R. Gay. ... (et. al. ). 
 - 8th ed. 
 - New Jersey :  Pearson,  2006. 
 - xix, 614p. :  ill. ;  cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0131185349 :  us $40.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Research.<br/>Education--Research.