Azar, Betty Schrampfer <br/><br/>
Understanding & using English Grammar with answer key / 
Betty Schrampfer Azar Stacy A. Hagen 
 - 4th ed. 
 - NY:  Pearson,  2009. 
 - 530p. 
<br/><br/><label>ISBN: </label>9780132464505 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English Language- Textbook for foreign speakers<br/>English language- Grammar- Problems, exercises etc.
<br/><br/><label>LC Class. No.: </label>PE1128   / .A97 2009