Bansal, S. K. <br/><br/>
Encyclopaedia of computer science & information technology / 
S. K. Bansal and Pankaj Sharma. 
 - New Delhi :  A P H publishing,  c 2010. 
 - Vols :  ill. ;  23 cm. 
<br/><br/>V. 5- Call centre ; 
<br/><br/>337  337 
<br/><br/><label>ISBN: </label>978-81-313-0786-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer science--Encyclopedia.
<br/><br/><label>Dewey Class. No.: </label>004.03 / B22e