Roberta Laraga Omas-as, Ed.D. <br/><br/>
Introductory Economics (with Taxation, Agrarian Reform, & Cooperatives) 
Roberta Laraga Omas-as, Ed.D. 
 - Quezon City :  Great Books Publishing,  2008. 
<br/><br/><label>ISBN: </label>9789710391394