Ruhe, Valerie. Evaluation in distance education and e-learning: the unfolding model/ Valerie Ruhe, Bruno D. Zumbo - New York : Guilford Press, c2009. - xiii, 306 p. : 23 cm. ISBN: 9781593858728 (pbk. : alk. paper) 1593858728 (pbk. : alk. paper) Subjects--Topical Terms: Distance education--Evaluation.Computer-assisted instruction--Evaluation.Web-based instruction--Evaluation. Dewey Class. No.: 378.175 / RUH/E