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.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)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.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)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.