Riggenbach, Heidi. y Samuda, Virginia.  <br/><br/>
Grammar Dimensions: Book two.  

 -  Heinle & Heinle Publishers. 
 - 394 p.  
<br/><br/><label>ISBN: </label>0-8384-4002-9 
<br/><br/><label>Dewey Class. No.: </label>425.07 R5G7 1997 V. 2