Yap, C. Ongpin hopeful of Xi-Duterte deal on WPS energy resources. In Business. Manila Bulletin.
Citazione stile Chigago Style (17a edizione)Yap, Cecilia. "Ongpin Hopeful of Xi-Duterte Deal on WPS Energy Resources. In Business." Manila Bulletin .
Citatione MLA (9a ed.)Yap, Cecilia. "Ongpin Hopeful of Xi-Duterte Deal on WPS Energy Resources. In Business." Manila Bulletin, .
Attenzione: Queste citazioni potrebbero non essere precise al 100%.