Longman. <br/><br/>
Longman essential activator 

 - [S.L] :  Longman Group,  2007 
 - 997. 
<br/><br/><label>ISBN: </label>9812239049 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English dictionaries
<br/><br/><label>Dewey Class. No.: </label>423  / LON