Beasley, Jeffrey S., <br/><br/>
Modern electronic communication / 

 - 8th ed. 
 - Upper Saddle River  Pearson/Prentice Hall,  2005. 
 - xxxi, 923 p. :  ill. (col.) ;  26 cm. + 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0131130374 
<br/><br/><label>LC Class. No.: </label>TK5101  / .B35 2005