APA (7th ed.) Citation

(2006). The State of the Philippine environment (3rd ed. 2006.). IBON Databank and Research Center.

Chicago Style (17th ed.) Citation

The State of the Philippine Environment. 3rd ed. 2006. Quezon City: IBON Databank and Research Center, 2006.

MLA (9th ed.) Citation

The State of the Philippine Environment. 3rd ed. 2006. IBON Databank and Research Center, 2006.