Gay, L. R. <br/><br/>
Educational research   competencies for analysis nad application  [Book] 
L. R. Gay. 
 - 5th Ed. 
 -  National Book Foundation Islamabad 
<br/><br/> All. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational Ressearch
<br/><br/><label>Dewey Class. No.: </label>370.72