APA (7th ed.) Zitazioa
(2000). OECD statistics on international trade in services: 1989-1998. OECD.
Chicago Style (17th ed.) Zitazioa
OECD Statistics on International Trade in Services: 1989-1998. Paris, France: OECD, 2000.
MLA (9th ed.) Zitazioa
OECD Statistics on International Trade in Services: 1989-1998. OECD, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.