APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.