21st Century Watershed Technology: Improving Water Quality and Env Conference Proceedings, 21-24 February 2010, Universidad EARTH, Costa Rica (71 papers). ASABE.
芝加哥风格引文21st Century Watershed Technology: Improving Water Quality and Env Conference Proceedings, 21-24 February 2010, Universidad EARTH, Costa Rica (71 Papers). ASABE.
MLA引文21st Century Watershed Technology: Improving Water Quality and Env Conference Proceedings, 21-24 February 2010, Universidad EARTH, Costa Rica (71 Papers). ASABE.
警告：这些引文格式不一定是100％准确.