Dyfyniad APA
(2013). OECD statistics on international trade in services. OECD.
Dyfyniad Arddull Chicago
OECD Statistics on International Trade in Services. [Paris, France]: OECD, 2013.
Dyfyniad MLA
OECD Statistics on International Trade in Services. OECD, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.