Richards, Jack C. <br/><br/>
Interchange : English for international comunication : teacher's manual 

 - Cambridge  Cambridge University Press  1995 
 - 174 p.  grafs. 
<br/><br/><label>ISBN: </label>052146742X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LENGUA INGLESA<br/>GRAMATICA