University for Peace. International preparatory meeting of the area of natural resources and the quality of life.
Chicago-viite (17. p.)University for Peace. International Preparatory Meeting of the Area of Natural Resources and the Quality of Life. San José.
MLA-viite (9. p.)University for Peace. International Preparatory Meeting of the Area of Natural Resources and the Quality of Life.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.