Dyfyniad APA

(2000). OECD statistics on international trade in services: 1989-1998. OECD.

Dyfyniad Arddull Chicago

OECD Statistics on International Trade in Services: 1989-1998. Paris, France: OECD, 2000.

Dyfyniad MLA

OECD Statistics on International Trade in Services: 1989-1998. OECD, 2000.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.