World Health Organization & United Nations Environment Programme. (2006). Who guidelines for the safe use of wastewater excreta and greywater: Waste water and excreta use in agriculture. World Health Organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Health Organization और United Nations Environment Programme. Who Guidelines for the Safe Use of Wastewater Excreta and Greywater: Waste Water and Excreta Use in Agriculture. Geneva: World Health Organization, 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Health Organization और United Nations Environment Programme. Who Guidelines for the Safe Use of Wastewater Excreta and Greywater: Waste Water and Excreta Use in Agriculture. World Health Organization, 2006.
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