Dumas, M Barry  <br/><br/>
Principles of Computer Networks and Communications 

 - New Delhi:  Dorling Kindersley,  2012. 
 - xxix, 519  ( R14,SH 01). 
<br/><br/><label>ISBN: </label>9788131790625 
<br/><br/><label>Source: </label> Punjab Book  PKR 981.41 
<br/><br/><label>Dewey Class. No.: </label>005