Stallings, William <br/><br/>
Data and computer communications / 
William Stallings. 
 - 9th ed. 
 - New Delhi:  Pearson Education,  2014. 
 - 864p.; 24cm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9789332518865 
<br/><br/><label>Dewey Class. No.: </label>004.6 STA