Não informado. (1941). Educational and Psychological Measurement. Educational and Psychological Measurement.
Lua i Stíl Chicago (17ú heag.)Não informado. Educational and Psychological Measurement. Durham, NC: Educational and Psychological Measurement, 1941.
Lua MLA (8ú heag.)Não informado. Educational and Psychological Measurement. Educational and Psychological Measurement, 1941.
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