APA

Department of the Environment T. a. t. R., Department of the Environment for Northern Ireland, . (1997). Economic Instruments for Water Pollution. Londres: Department of the environment for Northern Ireland.

Chicago

Department of the Environment Transport and the Regions, Department of the Environment for Northern Ireland, . 1997. Economic Instruments for Water Pollution. Londres: Department of the environment for Northern Ireland.

Harvard

Department of the Environment T. a. t. R., Department of the Environment for Northern Ireland, . (1997). Economic Instruments for Water Pollution. Londres: Department of the environment for Northern Ireland.

MLA

Department of the Environment Transport and the Regions, Department of the Environment for Northern Ireland, . Economic Instruments for Water Pollution. Londres: Department of the environment for Northern Ireland. 1997.