(2000). Productivity, innovation, and economic performance. Cambridge, England: Cambridge University Press.
Dyfyniad Arddull ChicagoProductivity, Innovation, and Economic Performance. Cambridge, England: Cambridge University Press, 2000.
Dyfyniad MLAProductivity, Innovation, and Economic Performance. Cambridge, England: Cambridge University Press, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.