(2006). The State of the Philippine environment (3rd ed.). Ibon Databank and Research Center.
芝加哥风格引文The State of the Philippine Environment. 3rd ed. Quezon City: Ibon Databank and Research Center, 2006.
MLA引文The State of the Philippine Environment. 3rd ed. Ibon Databank and Research Center, 2006.
警告：这些引文格式不一定是100％准确.