Claessens, S. ,., & Duncan, R. C. (1993). Managing commodity price risk in developing countries: A world bank book. The johns hopkins university press.
Dyfyniad Arddull ChicagoClaessens, Stijn ,ed, and Ronald C. Duncan. Managing Commodity Price Risk in Developing Countries: A World Bank Book. London: The johns hopkins university press, 1993.
Dyfyniad MLAClaessens, Stijn ,ed, and Ronald C. Duncan. Managing Commodity Price Risk in Developing Countries: A World Bank Book. The johns hopkins university press, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.