Riso, Don Richard. <br/><br/>
Personality types :  using the enneagram for self-discovery / 
Don Richard Riso with Russ Hudson. 
 - Rev. ed. 
 - Boston :  Houghton Mifflin,  c1996. 
 - xxvi, 514 p. :  ill. ;  21 cm. 
<br/><br/>Includes bibliographical references (p. [495]-497) and index. 
<br/><br/><label>ISBN: </label>0395798671 
<br/><br/><label>LCCN: </label>96022202  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Typology (Psychology)<br/>Enneagram.
<br/><br/><label>LC Class. No.: </label>BF698.4  / R595P 
<br/><br/><label>Dewey Class. No.: </label>155.2/6  / R595P