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Dyfyniad Arddull ChicagoInternational Solid Association. Industry As a Partner for Sustainable Development: Waste Management. United Kingdom: UNEP, 2002.
Dyfyniad MLAInternational Solid Association. Industry As a Partner for Sustainable Development: Waste Management. United Kingdom: UNEP, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.