APA-čujuhus (7. p.)

KEEGAN, D. (1996). Foundations of distance education.-- Ed. 3. Routledge.

Chicago-čujuhus (17. p.)

KEEGAN, Desmond. Foundations of Distance Education.-- Ed. 3. London: Routledge, 1996.

MLA-čujuhus (9. p.)

KEEGAN, Desmond. Foundations of Distance Education.-- Ed. 3. Routledge, 1996.

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