Cita APA (7a ed.)

Verduin, J. R., & Clark, T. A. (1991). Distance education: The foundations of effective practice. Jossey-Bass.

Cita Chicago Style (17a ed.)

Verduin, John R., y Thomas A. Clark. Distance Education: The Foundations of Effective Practice. San Francisco: Jossey-Bass, 1991.

Cita MLA (9a ed.)

Verduin, John R., y Thomas A. Clark. Distance Education: The Foundations of Effective Practice. Jossey-Bass, 1991.