Gregory Mankiw, N <br/><br/>
Principles of Economics / 
by N. Gregory Mankiw  
 - 4th Ed. 
 - Australia:  Thomson Learning,  2007 
 - p.896 
<br/><br/><label>ISBN: </label>8131503127 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics
<br/><br/><label>Dewey Class. No.: </label>330  / GRE-P