Covey, Sean <br/><br/>
7 Habits of Highly Effective Teenagers / 
by Sean Covey 
 - London :  Simon & Schuster,  1998. 
<br/><br/><label>ISBN: </label>0743252527  £9.99 
<br/><br/><label>Subjects--Index Terms: </label>Personality Developement Social Group Teenagers - Personality Development