Plato | Coimbra University Press. Cambridge University Press.
Dyfyniad Arddull ChicagoPlato | Coimbra University Press. Cambridge University Press.
Dyfyniad MLAPlato | Coimbra University Press. Cambridge University Press.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.