Chipongian, L. C. (2003). BIR expands paperless tax system registration. Manila Bulletin.
Citación estilo ChicagoChipongian, Lee C. "BIR Expands Paperless Tax System Registration." Manila Bulletin 2003.
Cita MLAChipongian, Lee C. "BIR Expands Paperless Tax System Registration." Manila Bulletin, 2003.
Warning: These citations may not always be 100% accurate.