Lipsey R G <br/><br/>
Principles of economics 
Lipsey R G; Chrystal K A 
 - 9 
 - New York  New York, Oxford University  1999 
 - xvi,640 
<br/><br/><label>ISBN: </label>0-19-566348-9 
<br/><br/><label>Source: </label>Textbook