(1998). Valuing the global environment: Actions & investments for a 21st century. Global Environment Facility.
Cita Chicago (17th ed.)Valuing the Global Environment: Actions & Investments for a 21st Century. Washington, D.C.: Global Environment Facility, 1998.
Cita MLA (8th ed.)Valuing the Global Environment: Actions & Investments for a 21st Century. Global Environment Facility, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.