APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.