Ingildsen, P. (2020). Water Stewardship. IWA Publishing.
Lua i Stíl Chicago (17ú heag.)Ingildsen, Pernille. Water Stewardship. IWA Publishing, 2020.
Lua MLA (9ú heag.)Ingildsen, Pernille. Water Stewardship. IWA Publishing, 2020.
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