KEEGAN, D. (1996). Foundations of distance education.-- Ed. 3. Routledge.
Chicago Style (17. basım) AtıfKEEGAN, Desmond. Foundations of Distance Education.-- Ed. 3. London: Routledge, 1996.
MLA (9th ed.) AtıfKEEGAN, Desmond. Foundations of Distance Education.-- Ed. 3. Routledge, 1996.
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