APA (7th ed.) Citation

Sewart, D., Keegan, D., & Holmberg, B. (1988). Distance education: International perspectives. Routledge.

Chicago Style (17th ed.) Citation

Sewart, David, Desmond Keegan, and Borje Holmberg. Distance Education: International Perspectives. London: Routledge, 1988.

MLA (9th ed.) Citation

Sewart, David, et al. Distance Education: International Perspectives. Routledge, 1988.