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Dyfyniad Arddull ChicagoKrumm, Rob. Learning Lotus 1-2-3 for Business. Reading, Mass.: Addison-Wesley Pub. Co., 1988.
Dyfyniad MLAKrumm, Rob. Learning Lotus 1-2-3 for Business. Addison-Wesley Pub. Co., 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.