World Health Organization Unite Nations Environment Programme FAO. (2006). Who guidelines for the safe use of water, excreta and greywater: Wastewater use in agriculture. World Health Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Health Organization Unite Nations Environment Programme FAO. Who Guidelines for the Safe Use of Water, Excreta and Greywater: Wastewater Use in Agriculture. Geneva: World Health Organization, 2006.
Παραπομπή σε μορφή MLA (8th εκδ.)World Health Organization Unite Nations Environment Programme FAO. Who Guidelines for the Safe Use of Water, Excreta and Greywater: Wastewater Use in Agriculture. World Health Organization, 2006.
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