APA引文

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

Chicago Style (17th ed.) Citation

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

MLA引文

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