Roger A. Arnold 
Economics. Ed 9 
 - 9th Ed 
 - Cincinnati, Ohio  South-Western College Publishing  2010 
 - 826p 
Roger A. Arnold: Economics. Ed 9.  (9th Ed)  Cincinnati, Ohio.  South-Western College Publishing, 2010. 0-324-78568-2--(330ARN)   
ENGLISH 
0-324-78568-2 
330  / ARO