Aspell, Patrick J <br/><br/>
The enneagram personality portraits :  Enhancing professional relationships / 
Patrick J. Apsell, Dee Apsell. 
 - New York :  Jossey-Bass,  1997. 
 - 150 p. :  ill ;  27sm. 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0-7879-0883-5 cloth