ebrary, Inc, Savin-Baden, M., & Wilkie, K. (2006). Problem-based learning online. Open University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रebrary, Inc, Maggi Savin-Baden, और Kay Wilkie. Problem-based Learning Online. Maidenhead: Open University Press, 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्रebrary, Inc, et al. Problem-based Learning Online. Open University Press, 2006.
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