Williamson, T. (1996). Knowing and asserting. Duke University Press.
Dyfyniad Arddull ChicagoWilliamson, T. Knowing and Asserting. Duke University Press, 1996.
Dyfyniad MLAWilliamson, T. Knowing and Asserting. Duke University Press, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.