Sax, G. (1974). Principles of educational measurement and evaluation. Wadsworth Pub. Co.
Lua i Stíl Chicago (17ú heag.)Sax, Gilbert. Principles of Educational Measurement and Evaluation. Belmont, Calif.: Wadsworth Pub. Co, 1974.
Lua MLA (8ú heag.)Sax, Gilbert. Principles of Educational Measurement and Evaluation. Wadsworth Pub. Co, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.