(1982). Energy sectoral survey series. Planning Service, Ministry of Energy.
Chicago (17e ed.) BronvermeldingEnergy Sectoral Survey Series. Makati, Metro Manila: Planning Service, Ministry of Energy, 1982.
MLA (9e ed.) BronvermeldingEnergy Sectoral Survey Series. Planning Service, Ministry of Energy, 1982.
Let op: Deze citaties zijn niet altijd 100% accuraat.