UNICEF & United Nations Environment Programme. (1990). Children and the environment. United Nations Environment Programme.
Citazione stile Chigago Style (17a edizione)UNICEF e United Nations Environment Programme. Children and the Environment. Nairobi, Kenya: United Nations Environment Programme, 1990.
Citatione MLA (9a ed.)UNICEF e United Nations Environment Programme. Children and the Environment. United Nations Environment Programme, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.