Emerson, Eric <br/><br/>
Challenging behaviour: analysis and intervention in people with severe intellectual disabilities 

 - 2nd ed 
 - Cambridge  Cambridge University Press  2001 
 - 224p. 
<br/><br/>   
<br/><br/><label>ISBN: </label>0-521-79444-7 
<br/><br/><label>Subjects--Index Terms: </label>Mentally handicapped  Mental health  Behaviour modification