Sax, G. (1989). Principles of educational and psychological measurement and evaluation (3rd ed.). Wadsworth Pub. Co.
Chicago-Zitierstil (17. Ausg.)Sax, Gilbert. Principles of Educational and Psychological Measurement and Evaluation. 3rd ed. Belmont, Calif: Wadsworth Pub. Co, 1989.
MLA-Zitierstil (9. Ausg.)Sax, Gilbert. Principles of Educational and Psychological Measurement and Evaluation. 3rd ed. Wadsworth Pub. Co, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.