Stallings William <br/><br/>
Business Datacommunication 

 - 4th Ed. 
 -  "Pearson, New Delhi"  2004 
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>8178086824 
<br/><br/><label>Dewey Class. No.: </label>4.6  / STA