Swan, Michael. <br/><br/>
Practical English usage  
Michael Swan 
 - 3rd ed. 
 - Oxford, UK    Oxford University    2005 
 - 658 p. 
<br/><br/> 1-Ingl,s -- Uso,  2- Ingl,s -- Gram tica -- 1950- 
<br/><br/><label>ISBN: </label>9780194420983 
<br/><br/><label>LC Class. No.: </label>PE1106 S83p 2005