APA aipamena

Philippines. Nayional Irrigation Administration. Upper Pampanga river project. s.n].

Chicago Style aipamena

Philippines. Nayional Irrigation Administration. Upper Pampanga River Project. [manila: s.n].

MLA aipamena

Philippines. Nayional Irrigation Administration. Upper Pampanga River Project. s.n].

Kontuz: berrikusi erreferentzia hauek erabili aurretik.