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Dyfyniad Arddull ChicagoTodaro, Michael P. Economic Development. 8th.ed. Pearson Education: India, 2003.
Dyfyniad MLATodaro, Michael P. Economic Development. 8th.ed. India, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.