Amojelar, D. G. (2011). Regulator cuts SMS interconnection charges. Manila Times.
Chicago Style aipamenaAmojelar, Darwin G. "Regulator Cuts SMS Interconnection Charges." Manila Times 2011.
MLA aipamenaAmojelar, Darwin G. "Regulator Cuts SMS Interconnection Charges." Manila Times, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.