Paterson, Ken. <br/><br/>
Oxford Practice Grammar: with answers : Basic. 

 - China:  Oxford University Press,  2006. 
 - 296 páginas 
<br/><br/><label>ISBN: </label>978-019-457-978-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INGLES - GRAMATICA