Paul A. Samuelson and William D. Nordhaus. <br/><br/>
Economics :  Fourteenth Edition / 
Samuelson and Nordhaus. 
 - np. 
<br/><br/><label>ISBN: </label>9789710856220 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics--1993--Philippines--newsprint.