World Health Organization. (1991). Environmental health criteria 148. World Health Organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Environmental Health Criteria 148. Geneva: World Health Organization, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Environmental Health Criteria 148. World Health Organization, 1991.
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