Lang wen wai yan she xin gai nian ying yu. 4,  liu li ying yu 
 新概念英语. 4, 流利英语 : 新版 : new edition 

 - Beijing:  Wai yu jiao xue yu yan jiu chu ban she,  1997 
 - 285 pages :  illustrations,;  26 cm 
<br/><br/><label>ISBN: </label>9787560013497 
<br/><br/><label>ISSN: </label>756001349X 
<br/><br/><label>LC Class. No.: </label>CHI001199