Riordan, Rick <br/><br/>
The Battle of the Labyrinth / 
Rick Riordan. 
 - New York :  Scholastic,  2008. 
 - [ ] p.: 19cm 
<br/><br/><br/>Filipino 
<br/><br/><label>ISBN: </label>13: 978-0-545-17481-7 
<br/><br/><label>LC Class. No.: </label>R47b bk.4