APA aipamena

Leonard,Dick. (1988). Guide to the European union (5.). The economist in association with profile book.

Chicago Style aipamena

Leonard,Dick. Guide to the European Union. 5. London: The economist in association with profile book, 1988.

MLA aipamena

Leonard,Dick. Guide to the European Union. 5. The economist in association with profile book, 1988.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.