United Nations Environment Programme & Clarke, H. (1992). The Contamination of food. United Nations Environment Programme.
Citazione stile Chigago Style (17a edizione)United Nations Environment Programme e Hazel Clarke. The Contamination of Food. Nairobi, Kenya: United Nations Environment Programme, 1992.
Citatione MLA (9a ed.)United Nations Environment Programme e Hazel Clarke. The Contamination of Food. United Nations Environment Programme, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.