Worthen, B. R., & Sanders, J. R. (1987). Educational evaluation: Alternative approaches and practical guidelines. Longman.
Lua i Stíl Chicago (17ú heag.)Worthen, Blaine R., agus James R. Sanders. Educational Evaluation: Alternative Approaches and Practical Guidelines. New York: Longman, 1987.
Lua MLA (8ú heag.)Worthen, Blaine R., agus James R. Sanders. Educational Evaluation: Alternative Approaches and Practical Guidelines. Longman, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.