Arao, D. A. (1999). Are prices really going down? IBON Facts & Figures.
Cita Chicago (17th ed.)Arao, Danilo A. "Are Prices Really Going Down?" IBON Facts & Figures 1999.
Cita MLA (9th ed.)Arao, Danilo A. "Are Prices Really Going Down?" IBON Facts & Figures, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.