Organisation for Economic Co-operation and Development. (2020). Financing water supply, sanitation and flood protection: Challenges in eu member states and policy options. Organisation for Economic Co-operation and Development.
Չիկագոյի ոճի (17րդ խմբ.) մեջբերումOrganisation for Economic Co-operation and Development. Financing Water Supply, Sanitation and Flood Protection: Challenges in Eu Member States and Policy Options. Paris, France: Organisation for Economic Co-operation and Development, 2020.
MLA (9րդ խմբ.) ՄեջբերումOrganisation for Economic Co-operation and Development. Financing Water Supply, Sanitation and Flood Protection: Challenges in Eu Member States and Policy Options. Organisation for Economic Co-operation and Development, 2020.
Զգուշացում. այս մեջբերումները միշտ չէ, որ կարող են 100% ճշգրիտ լինել.