APA (7e ed.) Bronvermelding

Philippines (Republic) National Irrigation Administration & United States Bureau of Reclamation. (1971). Land classification and supporting studies on the Upper Pampanga River Project. s.n.].

Chicago (17e ed.) Bronvermelding

Philippines (Republic) National Irrigation Administration en United States Bureau of Reclamation. Land Classification and Supporting Studies on the Upper Pampanga River Project. [Quezon City: s.n.], 1971.

MLA (9e ed.) Bronvermelding

Philippines (Republic) National Irrigation Administration en United States Bureau of Reclamation. Land Classification and Supporting Studies on the Upper Pampanga River Project. s.n.], 1971.