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Dyfyniad Arddull ChicagoSen,Amartya. Choice, Welfare and Measurement. New Delhi: Oxford University Press, 1982.
Dyfyniad MLASen,Amartya. Choice, Welfare and Measurement. Oxford University Press, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.