World Resources Institute, United Nations Environment Programme, & United Nations Development Programme. (1990). World resources. Oxford University Press.
芝加哥风格引文World Resources Institute, United Nations Environment Programme, 与 United Nations Development Programme. World Resources. New York: Oxford University Press, 1990.
MLA引文World Resources Institute, et al. World Resources. Oxford University Press, 1990.
警告：这些引文格式不一定是100％准确.