(2000). Air quality guidelines for Europe (Second edition.). World Health Organization Regional Office for Europe.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAir Quality Guidelines for Europe. Second edition. Copenhagen, Denmark: World Health Organization Regional Office for Europe, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAir Quality Guidelines for Europe. Second edition. World Health Organization Regional Office for Europe, 2000.
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