Grier, D. A. (2005). When computers were human. Princeton University Press.
Dyfyniad Arddull ChicagoGrier, David Alan. When Computers Were Human. Princeton: Princeton University Press, 2005.
Dyfyniad MLAGrier, David Alan. When Computers Were Human. Princeton University Press, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.