Dante C. Simbulan <br/><br/>
The Modern PRINCIPALIA: The Historical Evolution of the Philippine Ruling Oligarchy 

 -  The University of the Philippines Press  2005 
<br/><br/> Includes Selected Bibliography and Index 
<br/><br/><label>ISBN: </label>971-542-496-1 
<br/><br/><label>Dewey Class. No.: </label>Fil. 305.5230599 Si4 2003