"Swan, M." <br/><br/>
Practical english usage / 
M. Swan 
 - indin ed. 
 - New York:  "Oxford University Press,"  2005 
 - 653p. 
<br/><br/><label>Subjects--Index Terms: </label>Business communicationpractical English 
<br/><br/><label>Dewey Class. No.: </label>420