Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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