Cita APA (7a ed.)
Ryder, G. [. o. f., & . The United Nations world water development report, 2017: Wastewater: the untapped resource (1.). UNESCO.
Cita Chicago Style (17a ed.)
Ryder, Guy [writer of foreword], y. The United Nations World Water Development Report, 2017: Wastewater: The Untapped Resource. 1. UNESCO.
Cita MLA (9a ed.)
Ryder, Guy [writer of foreword], y. The United Nations World Water Development Report, 2017: Wastewater: The Untapped Resource. 1. UNESCO.
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