APA aipamena

Rivera, D. PetroEnergy, partners extend West Africa oil concession. The Philippine Star.

Chicago Style aipamena

Rivera, Danessa. "PetroEnergy, Partners Extend West Africa Oil Concession." The Philippine Star .

MLA aipamena

Rivera, Danessa. "PetroEnergy, Partners Extend West Africa Oil Concession." The Philippine Star, .

Kontuz: berrikusi erreferentzia hauek erabili aurretik.