Thomson, A J; Martinet, A V <br/><br/>
Practical English grammar 

 - 4 
 -  Oxford University Press, Oxford  2002 
 - 383 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English structural system
<br/><br/><label>Dewey Class. No.: </label>425  THO-P4