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.
Citação do estilo Chicago (17ª ed.)World Health Organization 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.
Citação MLA (8ª ed.)World Health Organization 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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