Sax, G. (1980). Principles of educational and psychological measurement and evaluation (2nd ed.). Wadsworth Pub. Co..
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Dyfyniad Arddull Chicago
Sax, Gilbert. Principles of Educational and Psychological Measurement and Evaluation. 2nd ed. Belmont, Calif.: Wadsworth Pub. Co., 1980.
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Dyfyniad MLA
Sax, Gilbert. Principles of Educational and Psychological Measurement and Evaluation. 2nd ed. Wadsworth Pub. Co., 1980.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.