Richardson,G B. (1998). The economics of imperfect knowledge: Collected papers of G R Richardson. Edward Elgar.
Dyfyniad Arddull ChicagoRichardson,G B. The Economics of Imperfect Knowledge: Collected Papers of G R Richardson. UK: Edward Elgar, 1998.
Dyfyniad MLARichardson,G B. The Economics of Imperfect Knowledge: Collected Papers of G R Richardson. Edward Elgar, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.