APA (7th ed.) Citation

Diehl, W. C., & Moore, M. G. (2019). Handbook of distance education (Fourth edition.). Routledge.

Chicago Style (17th ed.) Citation

Diehl, William C., and Michael G. Moore. Handbook of Distance Education. Fourth edition. New York: Routledge, 2019.

MLA (9th ed.) Citation

Diehl, William C., and Michael G. Moore. Handbook of Distance Education. Fourth edition. Routledge, 2019.