Dyfyniad APA

International Trade Centre UNCTAD/GATT. (1975). Trade information classification. The Centre.

Dyfyniad Arddull Chicago

International Trade Centre UNCTAD/GATT. Trade Information Classification. Geneva: The Centre, 1975.

Dyfyniad MLA

International Trade Centre UNCTAD/GATT. Trade Information Classification. The Centre, 1975.

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