Gay, L. (1980). Educational evaluation & measurement: Competencies for analysis and application. Charles E.Merrill.
Lua i Stíl Chicago (17ú heag.)Gay, L.R. Educational Evaluation & Measurement: Competencies for Analysis and Application. Columbus: Charles E.Merrill, 1980.
Lua MLA (9ú heag.)Gay, L.R. Educational Evaluation & Measurement: Competencies for Analysis and Application. Charles E.Merrill, 1980.
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