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Dyfyniad Arddull ChicagoClark, Colin, and George Thomas Jones. The Demand for Housing. London: Centre for Environmental Studies, 1971.
Dyfyniad MLAClark, Colin, and George Thomas Jones. The Demand for Housing. Centre for Environmental Studies, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.