United Nations. (1997). On solid ground: Science, technology, and integrated land management. IDRC.
芝加哥风格引文United Nations. On Solid Ground: Science, Technology, and Integrated Land Management. Ottawa: IDRC, 1997.
MLA引文United Nations. On Solid Ground: Science, Technology, and Integrated Land Management. IDRC, 1997.
警告：这些引文格式不一定是100％准确.