Gay, L. R. <br/><br/>
Educational research  competencies for analysis and applications 
L. R. Gay, Geoffrey E. Mills, Peter Airasian 
 - 10. ed. 
 - XVII, 647 S. : Ill. 
<br/><br/><label>ISBN: </label>978-0-13-261317-0 0-13-261317-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pädagogik<br/>Bildungsforschung<br/>Forschung