United Nations Conference on Environment and Development Rio de Janeiro, Brazil. (1997). Agenda 21: Programme of action for sustainable development ; Rio Declaration on Environment and Development ; Statement of Forest Principles. United Nations Dept. of Public Information.
Παραπομπή σε μορφή Chicago (17η εκδ.)United Nations Conference on Environment and Development Rio de Janeiro, Brazil. Agenda 21: Programme of Action for Sustainable Development ; Rio Declaration on Environment and Development ; Statement of Forest Principles. New York, N.Y: United Nations Dept. of Public Information, 1997.
Παραπομπή σε μορφή MLA (9th εκδ.)United Nations Conference on Environment and Development Rio de Janeiro, Brazil. Agenda 21: Programme of Action for Sustainable Development ; Rio Declaration on Environment and Development ; Statement of Forest Principles. United Nations Dept. of Public Information, 1997.