Murphy, Raymond <br/><br/>
Essential grammar in use :  a self-study reference and practice book for elementary students of English : with answers / 
Raymond Murphy 
 - 3rd ed. 
 - Cambridge :  Cambridge University Press,  2007 
 - xi, 319 p. :  col. ill. ;  26 cm. +  1 CD-ROM 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9780521675437 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Grammar<br/>English language--Grammar--Problems, exercises, etc.<br/>English language--Textbooks for foreign speakers--Textbooks for foreign speakers