Johnson, Roy. <br/><br/>
Influencing people / 
Roy Johnson. 
 - London :  Dorling Kindersley,  c2002. 
 - 72 p. :  ill. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0751338435 
<br/><br/><label>LC Class. No.: </label>HD58.7  / .J614