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Dyfyniad Arddull ChicagoYearley, Steven. Science, Technology, and Social Change. Boston: Unwin Hyman, 1988.
Dyfyniad MLAYearley, Steven. Science, Technology, and Social Change. Unwin Hyman, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.