Martin Norman M. (1989). Systems of logic. Cambridge University Press.
Dyfyniad Arddull ChicagoMartin Norman M. Systems of Logic. Cambridge: Cambridge University Press, 1989.
Dyfyniad MLAMartin Norman M. Systems of Logic. Cambridge University Press, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.