ebrary, Inc, & Helm, D. (2005). Climate-change policy. Oxford University Press.
芝加哥风格引文ebrary, Inc, 与 Dieter Helm. Climate-change Policy. Oxford: Oxford University Press, 2005.
MLA引文ebrary, Inc, 与 Dieter Helm. Climate-change Policy. Oxford University Press, 2005.
警告：这些引文格式不一定是100％准确.