Cofnodi Dyfyniadau
Dyfyniad APA
Wiederkehr, P., & Gilbert, R. (2002). Policy instruments for achieving environmentally sustainable transport. OECD.
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Dyfyniad Arddull Chicago
Wiederkehr, Peter, and Richard Gilbert. Policy Instruments for Achieving Environmentally Sustainable Transport. Paris, France: OECD, 2002.
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Dyfyniad MLA
Wiederkehr, Peter, and Richard Gilbert. Policy Instruments for Achieving Environmentally Sustainable Transport. OECD, 2002.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.