Association for Educational and Training Technology. (1989). International yearbook of educational and training technology. Kogan Page.
Παραπομπή σε μορφή Chicago (17η εκδ.)Association for Educational and Training Technology. International Yearbook of Educational and Training Technology. London: Kogan Page, 1989.
Παραπομπή σε μορφή MLA (9th εκδ.)Association for Educational and Training Technology. International Yearbook of Educational and Training Technology. Kogan Page, 1989.
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