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Dyfyniad Arddull ChicagoWORLD BANK. SUSTAINABLE DEVELOPMENT IN A DYNAMIC WORLD. NEW YORK: WORLD BANK, 2003.
Dyfyniad MLAWORLD BANK. SUSTAINABLE DEVELOPMENT IN A DYNAMIC WORLD. WORLD BANK, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.