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Dyfyniad Arddull ChicagoJapan Company Handbook: Second Section Summer 1993. Tokyo: Toyo Keizai Shinposha, 1993.
Dyfyniad MLAJapan Company Handbook: Second Section Summer 1993. Tokyo: Toyo Keizai Shinposha, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.