Oxford wordpower dictionary 

 - 4th ed. 
 - Oxford :  Oxford University Press,  2012 
 - vi, 839 p. :  ill. ;  20 cm. 
<br/><br/><label>ISBN: </label>9780194397988 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Dictionaries