(2003). Ibon facts and figures 2003. Ibon Foundation Databank and Research Center.
Cita Chicago (17th ed.)Ibon Facts and Figures 2003. Manila: Ibon Foundation Databank and Research Center, 2003.
Cita MLA (9th ed.)Ibon Facts and Figures 2003. Ibon Foundation Databank and Research Center, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.