Não informado. (1972). Improving human performance quarterly. National Society for Programmed Instruction.
Chicago-Zitierstil (17. Ausg.)Não informado. Improving Human Performance Quarterly. Washington: National Society for Programmed Instruction, 1972.
MLA-Zitierstil (8. Ausg.)Não informado. Improving Human Performance Quarterly. National Society for Programmed Instruction, 1972.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.