APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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