United Nations Conference on Environment and Development Rio de Janeiro, Brazil. (1993). Agenda 21: Programme of action for sustainable development : Rio Declaration on Environment and Development : Statement of Forest Principles : the final text of agreements negotiated by governments at the United Nations Conference on Environment and Development (UNCED), 3-14 June 1992, Rio de Janeiro, Brazil. 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 : The Final Text of Agreements Negotiated by Governments at the United Nations Conference on Environment and Development (UNCED), 3-14 June 1992, Rio De Janeiro, Brazil. New York, NY: United Nations Dept. of Public Information, 1993.
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 : The Final Text of Agreements Negotiated by Governments at the United Nations Conference on Environment and Development (UNCED), 3-14 June 1992, Rio De Janeiro, Brazil. United Nations Dept. of Public Information, 1993.