Swan, M. <br/><br/>
Practical english usage 

 - Oxford  Oxford  1980 
 - 654p. 
<br/><br/><label>ISBN: </label>0-19-442146-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English Grammar
<br/><br/><label>Dewey Class. No.: </label>425  / SWA