(1998). Valuing the global environment: Actions & investments for a 21st century. Global Environment Facility.
芝加哥风格引文Valuing the Global Environment: Actions & Investments for a 21st Century. Washington, D.C.: Global Environment Facility, 1998.
MLA引文Valuing the Global Environment: Actions & Investments for a 21st Century. Global Environment Facility, 1998.
警告：这些引文格式不一定是100％准确.