Davidson, G. <br/><br/>
Penguin writers' guides: Improve your spelling 

 - London  Penguin Books Ltd.   2005 
 - xi,324p. 
<br/><br/><label>ISBN: </label> RS 454.09 (UKP 4.99) 
<br/><br/><label>Source: </label> RS 454.09 (UKP 4.99) 
<br/><br/><label>Dewey Class. No.: </label>421.52 DAV