Dyfyniad APA

Radetzki,Marian. (1990). A guide to primary commodities in the world economy. Basil Blackwell.

Dyfyniad Arddull Chicago

Radetzki,Marian. A Guide to Primary Commodities in the World Economy. U K: Basil Blackwell, 1990.

Dyfyniad MLA

Radetzki,Marian. A Guide to Primary Commodities in the World Economy. Basil Blackwell, 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.