Philippines. National Statistics Office. (1988). Philippine energy statistics. The Office.
Citazione stile Chigago Style (17a edizione)Philippines. National Statistics Office. Philippine Energy Statistics. Manila: The Office, 1988.
Citatione MLA (9a ed.)Philippines. National Statistics Office. Philippine Energy Statistics. The Office, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.