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.