Doff, Adrian. <br/><br/>
Language in use :  beginner classroom book / 
by Adrian Doff. 
 - 6th ed. 
 - Cambridge :  Cambridge University,  2001. 
 - 128 p. :  ill., col ;  30 cm. 
<br/><br/><label>ISBN: </label>0521627079 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Grammar.