Murphy, Raymond <br/><br/>
Essential grammar in use :  a self study reference and practice book for elementary students of English / 
 Essential grammar in use :  with answers 
Raymond Murphy 
 - 3rd ed. 
 - United Kingdom :  Cambridge University Press,  2007 
 - xi, 319 :  col. ill. ;  27 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9780521675802