Birney, Betty G. <br/><br/>
Trouble according to Humphrey 
Betty G Birney 
 - ed. 
 - [S.l.]  Puffin Books  2008 
 - 183 p. 
<br/><br/><label>ISBN: </label>9780142410899 (pbk.) 9780329645472 (Follett bdg.)