Berko, Roy M. <br/><br/>
Communicating :  a social career focus / 
Roy M. Berko, Andrew D. Wolvin, Darlyn R. Wolvin. 
 - 4th edition. 
 - Boston :  Houghton Mifflin Company,  1984. 
 - xviii, 495 pages :  illustrations ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0395432456