(1999). Ibon facts and figures 1999. Ibon Foundation Databank and Research Center.
Chicagoスタイル(17版)引用形式Ibon Facts and Figures 1999. Manila: Ibon Foundation Databank and Research Center, 1999.
MLA(9版)引用形式Ibon Facts and Figures 1999. Ibon Foundation Databank and Research Center, 1999.
警告: この引用は必ずしも正確ではありません.