Organisation for Economic Co-operation and Development. (1979). Energy policies and programmes of IEA countries. Paris: Organisation for Economic Co-operation and Development.
Dyfyniad Arddull ChicagoOrganisation for Economic Co-operation and Development. Energy Policies and Programmes of IEA Countries. Paris: Organisation for Economic Co-operation and Development, 1979.
Dyfyniad MLAOrganisation for Economic Co-operation and Development. Energy Policies and Programmes of IEA Countries. Paris: Organisation for Economic Co-operation and Development, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.