Owen, John M Program evaluation : Forms and approaches / John M Owen, Marvin C Alkin. - 3rd ed. - New York : The Guilford Press, 2007. - xx, 298 p. : ill. ; 23 cm. Includes Reference ISBN: 9781593854065 Subjects--Topical Terms: Social sciences --Evaluation--Research Dewey Class. No.: 658.4 / OWE