Casanova, S. (2002). Cellular service providers nix proposed phone card tax scheme. Manila Times.
Cita Chicago Style (17a ed.)Casanova, Sheryll. "Cellular Service Providers Nix Proposed Phone Card Tax Scheme." Manila Times 2002.
Cita MLA (9a ed.)Casanova, Sheryll. "Cellular Service Providers Nix Proposed Phone Card Tax Scheme." Manila Times, 2002.
Precaución: Estas citas no son 100% exactas.