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Dyfyniad Arddull ChicagoKarya Penelitian Universitas Atma Jaya Yogyakarta 1997. Yogyakarta Lembaga Penelitian UAJY, 1997.
Dyfyniad MLAKarya Penelitian Universitas Atma Jaya Yogyakarta 1997. Yogyakarta Lembaga Penelitian UAJY, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.