APA (7th ed.) Citation

Keegan, D. (1983). Six distance education theorists. Zentrales Inst. für Fernstudienforschung.

Chicago Style (17th ed.) Citation

Keegan, Desmond. Six Distance Education Theorists. Hagen: Zentrales Inst. für Fernstudienforschung, 1983.

MLA (9th ed.) Citation

Keegan, Desmond. Six Distance Education Theorists. Zentrales Inst. für Fernstudienforschung, 1983.

Warning: These citations may not always be 100% accurate.