Sax, G. Principles of educational and psychological measurement and evaluation. Wadsworth.
Chicago-viite (17. p.)Sax, Gilbert. Principles of Educational and Psychological Measurement and Evaluation. Wadsworth.
MLA-viite (8. p.)Sax, Gilbert. Principles of Educational and Psychological Measurement and Evaluation. Wadsworth.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.