K. Werner, Patricia <br/><br/>
A communicative grammar 

 - 3a 
 - México  McGraw-Hill  1996 
 - 411 p. 
<br/><br/><label>ISBN: </label>71010566 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language
<br/><br/><label>LC Class. No.: </label>PE1128  / W47