United Nations Environment Programme. (2003). Tunza: Acting for a better world. United Nations Environment Programme.
芝加哥风格引文United Nations Environment Programme. Tunza: Acting for a Better World. [Nairobi, Kenya]: United Nations Environment Programme, 2003.
MLA引文United Nations Environment Programme. Tunza: Acting for a Better World. United Nations Environment Programme, 2003.
警告：这些引文格式不一定是100％准确.