Swan, Michael. <br/><br/>
How english works : a grammer practice book with answers   

 - New York :   Oxford Uni. Press,   1997. 
 - 903 ;  
<br/><br/><label>ISBN: </label>0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English
<br/><br/><label>Dewey Class. No.: </label>425  / SWA