Dyfyniad APA

(1981). Belgium-Luxembourg. [Paris]: Organisation for Economic Co-operation and Development.

Dyfyniad Arddull Chicago

Belgium-Luxembourg. [Paris]: Organisation for Economic Co-operation and Development, 1981.

Dyfyniad MLA

Belgium-Luxembourg. [Paris]: Organisation for Economic Co-operation and Development, 1981.

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