Murphy, Raymond <br/><br/>
Essential grammar in use : a self reference and practice book for elementary students of English : with answers 

 - Cambridge  Cambridge University  1990 
 - 259 p.  il. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LENGUA INGLESA<br/>GRAMATICA<br/>ENSEÑANZA DE LA LENGUA