Johnson, Keith. <br/><br/>
Communicate in Writing /  

 - 1st ed /  
 - Essex :   Longman Group Ltd. ,   1988 
 - p.125 :  
<br/><br/><label>ISBN: </label>0-582-74811-9 
<br/><br/><label>Dewey Class. No.: </label>P111(T:2)  / [M0]