Sweeney S. <br/><br/>
Engilish for Business Communication (with DD)  Textual Documents  
Sweeney S. 
 - 2nd Ed. 
 -  Cambridge University Press   2012 
 - 174 
<br/><br/><label>ISBN: </label>978-0-107-40053-5   
<br/><br/><label>Dewey Class. No.: </label>620