O'connell, S. <br/><br/>
Focus on proticiency / 
Sue O'connell 
 - Lasgow :  Collins E.L.T,  1989 
 - 300 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tiếng Anh--Cách dùng<br/>English language.<br/>English language--Usage
<br/><br/><label>Dewey Class. No.: </label>428  / OCO 1989