APA (7th ed.) Citation

Keegan, D. (1990). Foundations of distance education (2. ed.). Routledge.

Chicago Style (17th ed.) Citation

Keegan, Desmond. Foundations of Distance Education. 2. ed. London u.a: Routledge, 1990.

MLA (9th ed.) Citation

Keegan, Desmond. Foundations of Distance Education. 2. ed. Routledge, 1990.