Intermediate Units 6 and 7 

 - London  BPP Professional Education  2004 
 - xxviii, 536p.;  ill.: 
<br/><br/>Includes Index 
<br/><br/><label>ISBN: </label>0751715999 
<br/><br/><label>LC Class. No.: </label>HF 5681.B2  / .In8 2004