Boardman, Roy. <br/><br/>
Springboard I: English through communication /  

 - 1st ed /  
 - Oxford OX2 6DP :   Oxford University Press ,   1990 
 - p.85 :  
<br/><br/><label>ISBN: </label>0-19-432971-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Linguistics
<br/><br/><label>Dewey Class. No.: </label>P111:(T)  / M2