Gay, L. R. <br/><br/>
Educational Research :  competencies for analysis and applications / 
L. R. Gay 
 - 3rd ed. 
<br/><br/> All colleges  Bachelor of Elementary Education 
<br/><br/><label>ISBN: </label>0-675-20506-9 
<br/><br/><label>Dewey Class. No.: </label>370.78 G25