Business English and Communication  / 
Lyn R. Clark 
 - 5th ed. 
 - Toronto:  McGraw-Hill Ryerson Limited ,  1996. 
 - xvi,560 p,: 
<br/><br/><label>ISBN: </label>0075517760 
<br/><br/><label>LC Class. No.: </label>PE1115  / .C562 1996