World Health Organization. 2006. WHO guidelines for the safe use of wastewater, excreta and greywater: Vol. 1, Policy and regulatory aspects. Geneva: World Health Organization.
Citace podle APA (7th ed.)World Health Organization. (2006). WHO guidelines for the safe use of wastewater, excreta and greywater: Vol. 1, Policy and regulatory aspects. World Health Organization.
Citace podle Chicago (17th ed.)World Health Organization. WHO Guidelines for the Safe Use of Wastewater, Excreta and Greywater: Vol. 1, Policy and Regulatory Aspects. Geneva: World Health Organization, 2006.
Citace podle MLA (9th ed.)World Health Organization. WHO Guidelines for the Safe Use of Wastewater, Excreta and Greywater: Vol. 1, Policy and Regulatory Aspects. World Health Organization, 2006.
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