Hopkins, K. D. (1983). Educational and psychological measurement and evaluation (6th ed.). National Book Store.
Lua i Stíl Chicago (17ú heag.)Hopkins, Kenneth D. Educational and Psychological Measurement and Evaluation. 6th ed. Manila: National Book Store, 1983.
Lua MLA (9ú heag.)Hopkins, Kenneth D. Educational and Psychological Measurement and Evaluation. 6th ed. National Book Store, 1983.
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