(1998). Valuing the global environment: Actions & investments for a 21st century. Global Environment Facility.
Citazione stile Chigago Style (17a edizione)Valuing the Global Environment: Actions & Investments for a 21st Century. Washington, D.C.: Global Environment Facility, 1998.
Citatione MLA (8a ed.)Valuing the Global Environment: Actions & Investments for a 21st Century. Global Environment Facility, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.