Problems and methods in programmed learning: The Proceedings of the 1967 APL/NCPL Birmingham Conference Part 4.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रProblems and Methods in Programmed Learning: The Proceedings of the 1967 APL/NCPL Birmingham Conference Part 4.
एमएलए (9वां संस्करण) प्रशस्ति पत्रProblems and Methods in Programmed Learning: The Proceedings of the 1967 APL/NCPL Birmingham Conference Part 4.
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