(2001). OECD statistics on international trade in services 1990-1999 (2001 edition.). OECD.
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Dyfyniad Arddull Chicago
OECD Statistics on International Trade in Services 1990-1999. 2001 edition. Paris, Cedex, France: OECD, 2001.
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Dyfyniad MLA
OECD Statistics on International Trade in Services 1990-1999. 2001 edition. OECD, 2001.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.