Petre, Marian <br/><br/>
The Unwritten Rules of 

 - New Delhi:  Tata McGraw Hill,  2010. 
 - Xiii, 272  (R 4 SH 2 ) 
<br/><br/><label>ISBN: </label>9780071067973 
<br/><br/><label>Dewey Class. No.: </label>378.24