References
- Holmberg, B. Growth and Structure of Distance Education. London: Croom-Helm, 1986.
- Keegan, D. The Foundations of Distance Education. London: Croom-Helm, 1986.
- Moore, M. G. Towards a Theory of Independent Learning and Teaching. Journal of Higher Education, 44 (1973), 661–79.
- Moore, M. G. (ed.). Contemporary Issues in American Distance Education. Oxford: Pergamon Press, 1990.
- Rumble, G., and K. Harry (eds.). The Distance Teaching Universities. London: Croom-Helm, 1982.
- Rumble, G. The Planning and Management of Distance Education. New York: St. Martin's Press, 1986.
- Stewart, D., D. Keegan, and B. Holmberg (eds.). Distance Education: International Perspectives. New York: St. Martin's Press, 1983.