Proctor, Susan. <br/><br/>
New interchange: English for international communication. Student ́s book 1. 

 - Cambridge:  Cambridge University Press,  1997. 
 - 142 páginas 
<br/><br/><label>ISBN: </label>05-216-2881-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INGLES - ENSEÑANZA