International Economics: Theory and Policy,/ 
Krugman,Paul R. 
 - 8th.ed. 
 - New Delhi:  Pearson Education,  2009. 
 - 706 
<br/><br/><label>ISBN: </label>8131725634 
<br/><br/><label>Dewey Class. No.: </label>337  / KRU/I