Shadish, William R. Foundations of program evaluation : theories of practice / Wil liam R. Shadish, Thomas D. Cook, Laura C. Leviton. - Newbury Park : Sage Publications, 1991. - 529 p. ; 24 cm. Includes bibliographical references and index. ISBN: 0803053011 (pbk) 080393551X Subjects--Topical Terms: Evaluation research (Social action programs). Dewey Class. No.: 361.60684