Kumar, K. L. <br/><br/>
Educational technology :  A practical textbook for students, teachers, professionals and trainers-/ 
K. L. Kumar 
 - 2nd rev. ed. 
 - New Delhi  New  age international limited  2008 
 - xix, 345p. 
<br/><br/><label>ISBN: </label>978-8122421583 
<br/><br/><label>LC Class. No.: </label>LB1028.3  / .k86 2008