"Guffey, M.E." <br/><br/>
Business english / 
M.E. Guffey 
 - 4th 
 - America:  "Wadsworth Inc,"  1983 
 - 351p. 
<br/><br/><label>ISBN: </label>0-534-92906-0 
<br/><br/><label>Subjects--Index Terms: </label>Business english 
<br/><br/><label>Dewey Class. No.: </label>420