Philippines. Department of Energy. (2010). Directing the Preparations for the Trading of Ancillary Services in the Philippine Wholesale Electricity Spot Market ("WESM"). Philippine Daily Inquirer.
Cita Chicago (17th ed.)Philippines. Department of Energy. "Directing the Preparations for the Trading of Ancillary Services in the Philippine Wholesale Electricity Spot Market ("WESM")." Philippine Daily Inquirer 2010.
Cita MLA (9th ed.)Philippines. Department of Energy. "Directing the Preparations for the Trading of Ancillary Services in the Philippine Wholesale Electricity Spot Market ("WESM")." Philippine Daily Inquirer, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.