Não informado. (1972). Improving human performance quarterly. National Society for Programmed Instruction.
Chicago-viite (17. p.)Não informado. Improving Human Performance Quarterly. Washington: National Society for Programmed Instruction, 1972.
MLA-viite (8. p.)Não informado. Improving Human Performance Quarterly. National Society for Programmed Instruction, 1972.
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