POWELL, S. (1999). Returning to study: A guide for professionals. Open University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPOWELL, Stuart. Returning to Study: A Guide for Professionals. Open University Press, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPOWELL, Stuart. Returning to Study: A Guide for Professionals. Open University Press, 1999.
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