Dyfyniad APA

(2009). Direction of trade statistics 2009. Mixed Sources.

Dyfyniad Arddull Chicago

Direction of Trade Statistics 2009. Mixed Sources, 2009.

Dyfyniad MLA

Direction of Trade Statistics 2009. Mixed Sources, 2009.

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