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Dyfyniad Arddull ChicagoCai, Fang. Beyond Demographic Dividends. Singapore: World Scientific Publishing Company, 2014.
Dyfyniad MLACai, Fang. Beyond Demographic Dividends. World Scientific Publishing Company, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.