Não informado. (1972). Improving human performance quarterly. National Society for Programmed Instruction.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Improving Human Performance Quarterly. Washington: National Society for Programmed Instruction, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Improving Human Performance Quarterly. National Society for Programmed Instruction, 1972.
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