Case,Karl E. <br/><br/>
Principles of Economics / 
Karl Case,E ,Ray Fair,C and Sharon Oster. 
 - 9th ed. 
 - UP :  Dorling Kindersley(India)pvt.ltd,  2014. 
<br/><br/><label>ISBN: </label>9789332518186 
<br/><br/><label>Subjects--Index Terms: </label>Economics