Gay L.R. <br/><br/>
Educational Research : Competencies For Analysis And Applications./ L. R. Gay Geoffrey E. Mills And Peter Airasian 

 - 8th. ed. 
 -  Englewood Cliffs Nj : Prentice-Hall C2006. 
 - XIX 662 P.: ILL. 25 CM 
 -  0 .
<br/><br/><br/>ENG 
<br/><br/><label>ISBN: </label>0131185349 (Hbk)