Duck, Michael <br/><br/>
Data Communication.... 

 - 2nd Ed. 
 - New Delhi:  Dorling Kindersley,  2009. 
 - xx,415. ;  ( R14,SH 01). 
<br/><br/><label>ISBN: </label>9788131726082 
<br/><br/><label>Dewey Class. No.: </label>004.6