APA (7 वां संस्करण) प्रशस्ति पत्र

Engineering Consultants Inc & Philippines (Republic). National Irrigation Administration. (1971). Upper Pampanga River project power study. [s.n.].

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Engineering Consultants Inc और Philippines (Republic). National Irrigation Administration. Upper Pampanga River Project Power Study. Manila: [s.n.], 1971.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Engineering Consultants Inc और Philippines (Republic). National Irrigation Administration. Upper Pampanga River Project Power Study. [s.n.], 1971.