Principles of Marketing / 
Ong Camilar Serrano. 
 - Manila :  Unlimited Books Library Services & Publishing Inc.,  2021. 
 - x, 394 p.  
<br/><br/> Includes Bibliography, Webliography 
<br/><br/><label>ISBN: </label>9719654308 
<br/><br/><label>Dewey Class. No.: </label>381 Se683 2021