(2000). Research on transport economics (2000 edition.). OECD.
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Dyfyniad Arddull Chicago
Research on Transport Economics. 2000 edition. Paris Cedex, France: OECD, 2000.
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Dyfyniad MLA
Research on Transport Economics. 2000 edition. OECD, 2000.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.