Mackey, William Francis. <br/><br/>
Language Teaching Analysis /  

 - Fifth Impression 197 /  
 - London :   Longman Group Ltd. ,   1965 
 - p.561 :  
<br/><br/><label>ISBN: </label>0-582-52572-1 
<br/><br/><label>Dewey Class. No.: </label>P:(T:3)  / K5M;2