Perez, D. (1998). No law on bottled water. Manila Bulletin.
Cita Chicago (17th ed.)Perez, Delfin. "No Law on Bottled Water." Manila Bulletin 1998.
Cita MLA (9th ed.)Perez, Delfin. "No Law on Bottled Water." Manila Bulletin, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.