AZAR, Betty Schrampfer <br/><br/>
Understanding and using english grammar 

 - 3.ed 
 - Essex  Longman; Pearson  1999 
 - 437 
 - 19990000 
<br/><br/><label>ISBN: </label>013-958661-X 
<br/><br/><label>Dewey Class. No.: </label>421.1 A984u  / A984u