Book Review: Evaluation in Distance Education and E-Learning: The Unfolding Model

Joint Committee on Standards for Educational Evaluation. (1994). The program evaluation standards: How to assess evaluation of educational programs. (2nd ed.). Thousand Oaks, CA: Sage.

Messick S. (1989). Validity. In Linn R. L. (Ed.), Educational measurement (3rd ed., pp. 13–104). New York: Macmillan.