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Dyfyniad Arddull ChicagoPreserving Hanoi's Architectural And Landscap Heritage. Hanoi: Xay dung, 1999.
Dyfyniad MLAPreserving Hanoi's Architectural And Landscap Heritage. Hanoi: Xay dung, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.