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Dyfyniad Arddull ChicagoFinancial Acounting. Boston, Mass: Irwin/McGraw-Hill, 1997.
Dyfyniad MLAFinancial Acounting. Boston, Mass: Irwin/McGraw-Hill, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.