(1981). Evaluation Risearch And Practice Comparative And International Perspectives Edited By Robert A. Levine...[et. Al]. Sage Publications.
Lua i Stíl Chicago (17ú heag.)Evaluation Risearch And Practice Comparative And International Perspectives Edited By Robert A. Levine...[et. Al]. Sage Publications, 1981.
Lua MLA (8ú heag.)Evaluation Risearch And Practice Comparative And International Perspectives Edited By Robert A. Levine...[et. Al]. Sage Publications, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.