Cita APA (7th ed.)
(2000). OECD statistics on international trade in services: 1989-1998. OECD.
Cita Chicago (17th ed.)
OECD Statistics on International Trade in Services: 1989-1998. Paris, France: OECD, 2000.
Cita MLA (9th ed.)
OECD Statistics on International Trade in Services: 1989-1998. OECD, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.