Murphy, Raymond. <br/><br/>
Essential english grammar :  a self-study reference and practice book for elementary students of English : with answers / 
Raymond Murphy. 
 - Cambridge :  Cambridge University Press,  1992. 
 - 300 p . : 
<br/><br/><label>ISBN: </label>9788175960299 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language
<br/><br/><label>Dewey Class. No.: </label>428.24  / Es