Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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