(2000). Air quality guidelines for Europe (Second edition.). World Health Organization Regional Office for Europe.
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Dyfyniad Arddull Chicago
Air Quality Guidelines for Europe. Second edition. Copenhagen, Denmark: World Health Organization Regional Office for Europe, 2000.
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Dyfyniad MLA
Air Quality Guidelines for Europe. Second edition. World Health Organization Regional Office for Europe, 2000.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.