Não informado. (1966). Educational Technology. Educational Technology Publications.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Educational Technology. Englewood, NJ: Educational Technology Publications, 1966.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Educational Technology. Educational Technology Publications, 1966.
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