Ruhe, Valerie Evaluaation in distance education and E-Learning : the unfolding model Valerie Ruhe and Bruno D. Zumbo - New York: The Guilford Press, 2009. - xiii,306p. PB Eng ISBN: 9781593858735 Subjects--Topical Terms: Distance education-EvaluationComputer-Assisted instruction-Evaluation Dewey Class. No.: 375.175 / RUE