Arnold, Roger A. <br/><br/>
Principles of economics / 
Roger A. Arnold. 
 - Singapore :  Cengage Learning Asia,  2012. 
 - 796 p.:   ill.  26 cm. 
<br/><br/> Includes index 
<br/><br/><br/>in English 
<br/><br/><label>ISBN: </label>978-981-4410-29-8 
<br/><br/><label>LC Class. No.: </label>330 Ar63p c2012