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Dyfyniad Arddull ChicagoRazgaitis, Richard. Early-stages Technologies: Valuation and Pricing. New York: John Wiley, 1999.
Dyfyniad MLARazgaitis, Richard. Early-stages Technologies: Valuation and Pricing. John Wiley, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.