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

 - 3a. ed 
 - Cambridge  University Press  2007 
 - 319 p. : il., graf., cuad 
<br/><br/> Contents: Additional exercises with answers and Appendices. -- CD-ROM 
<br/><br/><br/>Inglés 
<br/><br/><label>ISBN: </label>978-0-521-67543-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INGLES-GRAMATICA; EJERCICIOS DE GRAMATICA