Cecco, J. P. D. (1968). The psychology of learning and instruction: Educational psychology. New Jersey: Prentice-Hall.
Παραπομπή Chicago StyleCecco, John P. De. The Psychology of Learning and Instruction: Educational Psychology. New Jersey: Prentice-Hall, 1968.
Παραπομπή MLACecco, John P. De. The Psychology of Learning and Instruction: Educational Psychology. New Jersey: Prentice-Hall, 1968.
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