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Dyfyniad Arddull ChicagoVarian, Hal R. The Economics of Information Technology: An Introduction. Cambridge,New York: Cambridge University Press, 2004.
Dyfyniad MLAVarian, Hal R. The Economics of Information Technology: An Introduction. Cambridge,New York: Cambridge University Press, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.