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Dyfyniad Arddull ChicagoHarding,Philip, and Jenkins,Richard. The Myth of the Hidden Economy: Towards a New Understanding of Informal Economic Activity. Philadelphia: Open University Press, 1989.
Dyfyniad MLAHarding,Philip, and Jenkins,Richard. The Myth of the Hidden Economy: Towards a New Understanding of Informal Economic Activity. Open University Press, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.