ebrary, Inc, & Carlsen, W. S. (2004). Watershed dynamics (Teacher ed.). NSTA Press, National Science Teachers Association.
芝加哥风格引文ebrary, Inc, 与 William S. Carlsen. Watershed Dynamics. Teacher ed. Arlington, Va.: NSTA Press, National Science Teachers Association, 2004.
MLA引文ebrary, Inc, 与 William S. Carlsen. Watershed Dynamics. Teacher ed. NSTA Press, National Science Teachers Association, 2004.
警告：这些引文格式不一定是100％准确.