Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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