Villegas, Bernardo M. <br/><br/>
Managerial economics :   text and case studies 
Bernardo M. Villegas 
 - 3rd edition 
 -  Sinag-tala publishers, inc., manila,   c1999. 
 - viii, 479 p. ;   22 cm. 
<br/><br/>includes index. 
<br/><br/><label>ISBN: </label>971-554-076-7 
<br/><br/><label>Dewey Class. No.: </label>Fil. 658 V714m 1999