APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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