Marx, G. (1984). Games nature plays: A reprint collection of essays about science education (Prelim. ed.). Unesco ; Orszagos Oktatastechnikai Kozpont.
Dyfyniad Arddull ChicagoMarx, Gyorgy. Games Nature Plays: A Reprint Collection of Essays About Science Education. Prelim. ed. [Budapest?]: Unesco ; Orszagos Oktatastechnikai Kozpont, 1984.
Dyfyniad MLAMarx, Gyorgy. Games Nature Plays: A Reprint Collection of Essays About Science Education. Prelim. ed. Unesco ; Orszagos Oktatastechnikai Kozpont, 1984.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.