Ballin, W. H. <br/><br/>
Perfect your English :  the easy way / 
W. H. Ballin. 
 - Hertfordshire, [Eng.] :  Prentice-Hall International,  1990. 
 - xviii, 330 p. :  ill. 
<br/><br/><label>ISBN: </label>0136586260 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--1950-<br/>English language--Textbooks for foreign speakers