Lipsey, M. W., & Brayfield, A. H. (1975). Programmed learning aid for the profession of psychology. Learning Systems.
Chicago-viite (17. p.)Lipsey, Mark W., ja Arthur H. Brayfield. Programmed Learning Aid for the Profession of Psychology. Homewood, Ill: Learning Systems, 1975.
MLA-viite (9. p.)Lipsey, Mark W., ja Arthur H. Brayfield. Programmed Learning Aid for the Profession of Psychology. Learning Systems, 1975.
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