Choy, Penelope <br/><br/>
Basic grammar and usage / 
Penelope Choy, Dorothy Goldbart Clark 
 - 7th ed. 
 - Boston :  Thomson Wadsworth,  c2006 
 - xii, 300 p. ;  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>1413008925 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Grammar<br/>English language--Composition and exercises