Casanova, S. (2003). Napocor to increase use of renewable energy, cites gain in reducing oil consumption. Manila Times.
Chicago-viite (17. p.)Casanova, Sheryll. "Napocor to Increase Use of Renewable Energy, Cites Gain in Reducing Oil Consumption." Manila Times 2003.
MLA-viite (9. p.)Casanova, Sheryll. "Napocor to Increase Use of Renewable Energy, Cites Gain in Reducing Oil Consumption." Manila Times, 2003.
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