Schrampfer Azar, Betty <br/><br/>
Understanding and using english grammar 

 - 3ª ed. 
 - s.l. :   Longman,   1998.  
 - 475 p. 
<br/><br/><label>ISBN: </label>0-13-95-8661- 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inglés
<br/><br/><label>Dewey Class. No.: </label>428.2  / S377f