William Stallings <br/><br/>
Business data communications 

 - 4th ed 
 - Pearson Education (Singapore), New Delhi  2001 
 - xxii,659 
<br/><br/><label>ISBN: </label>81-7808-682-4 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>COMMUNICATION <br/>Computer Science
<br/><br/><label>Dewey Class. No.: </label>001.64 Sta