ebrary, Inc, Savin-Baden, M., & Wilkie, K. (2006). Problem-based learning online. Open University Press.
芝加哥风格引文ebrary, Inc, Maggi Savin-Baden, 与 Kay Wilkie. Problem-based Learning Online. Maidenhead: Open University Press, 2006.
MLA引文ebrary, Inc, et al. Problem-based Learning Online. Open University Press, 2006.
警告：这些引文格式不一定是100％准确.