Eugenio, H. V. (1997). Government eyes 40 percent self-sufficiency in energy. Manila Times.
Chicago-referens (17:e uppl.)Eugenio, Haidee V. "Government Eyes 40 Percent Self-sufficiency in Energy." Manila Times 1997.
MLA-referens (9:e uppl.)Eugenio, Haidee V. "Government Eyes 40 Percent Self-sufficiency in Energy." Manila Times, 1997.
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