Stallings, William. <br/><br/>
Business data communications / 
William Stallings. 
 - 5th ed. 
 - Upper Saddle River, NJ :  Pearson/Prentice Hall,  c2005. 
 - xviii, 584 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>0131442570 
<br/><br/><label>LCCN: </label>2004044425 
<br/><br/><label>LC Class. No.: </label>HF5548.2 .S7728 2005  / .S7728 2005 
<br/><br/><label>Dewey Class. No.: </label>004.6