Gay, L.R. <br/><br/>
Educational research  : competenices for analysis and applitcations 
/ L.R. Gay, Peter Airasian 
 - 7th.ed. 
 - Upper Saddle River, N.J.  : Merril Prentice Hall,   , 2003 
 - xvii, 605p.  : il.  ; 26 cm. + 2 discos ópticos para computadora (4 3/4 in) 
<br/><br/><label>ISBN: </label>0130994634 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educación--- Investigación
<br/><br/><label>LC Class. No.: </label>LB1028  / G39 2003