OECD Centre for Effective Learning Environments. (2009). CELE exchange. Organisation for Economic Co-Operation and Development.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOECD Centre for Effective Learning Environments. CELE Exchange. Paris: Organisation for Economic Co-Operation and Development, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOECD Centre for Effective Learning Environments. CELE Exchange. Organisation for Economic Co-Operation and Development, 2009.
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