Dyfyniad APA

World Health Organization & International Water Association Environmental Protection Agency. (2012). Animal waste, water quality and human health. World Health Organization.

Dyfyniad Arddull Chicago

World Health Organization and International Water Association Environmental Protection Agency. Animal Waste, Water Quality and Human Health. London: World Health Organization, 2012.

Dyfyniad MLA

World Health Organization and International Water Association Environmental Protection Agency. Animal Waste, Water Quality and Human Health. World Health Organization, 2012.

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