Murphy, Raymond. <br/><br/>
Essential Grammer in use :  a self-study reference and practice book for elementary students of english. 

 - 2nd ed. 
 - New York :  Cambridge University Press,  2006. 
 - 300 p.  ill.  26 cm. 
<br/><br/>includes index. 
<br/><br/><label>ISBN: </label>0521529328 
<br/><br/><label>Dewey Class. No.: </label>428 MUR