Engineering Consultants Inc & Philippines (Republic). National Irrigation Administration. (1971). Upper Pampanga River project power study. [s.n.].
Chicago Style (17. basım) AtıfEngineering Consultants Inc ve Philippines (Republic). National Irrigation Administration. Upper Pampanga River Project Power Study. Manila: [s.n.], 1971.
MLA (9th ed.) AtıfEngineering Consultants Inc ve Philippines (Republic). National Irrigation Administration. Upper Pampanga River Project Power Study. [s.n.], 1971.
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