United Nations Environment Programme, Industry and Environment Programme Activity Centre, United Nations Environment Programme. Environmental Education and Training Unit, & International Solid Wastes and Public Cleansing Association. (1991). Hazardous waste: Policies and strategies : training manual. [UNEP].
Παραπομπή σε μορφή Chicago (17η εκδ.)United Nations Environment Programme, Industry and Environment Programme Activity Centre, United Nations Environment Programme. Environmental Education and Training Unit, και International Solid Wastes and Public Cleansing Association. Hazardous Waste: Policies and Strategies : Training Manual. Paris, France: [UNEP], 1991.
Παραπομπή σε μορφή MLA (9th εκδ.)United Nations Environment Programme, et al. Hazardous Waste: Policies and Strategies : Training Manual. [UNEP], 1991.