Riso, Don Richard <br/><br/>
Understanding the Enneagram:  the practical guide to personality types 

 - Boston  Houghton Mifflin Company  1990 
 - 288  p. 
<br/><br/><label>ISBN: </label>0-395-52148-3 
<br/><br/><label>Dewey Class. No.: </label>CIR  155.26 R4 1990