Calumpita, R. E. (2006). Amending IPC can lower drug costs. Manila Times.
Cita Chicago (17th ed.)Calumpita, Ronnie E. "Amending IPC Can Lower Drug Costs." Manila Times 2006.
Cita MLA (9th ed.)Calumpita, Ronnie E. "Amending IPC Can Lower Drug Costs." Manila Times, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.