Gay, L. R. (1996). Educational research: Competencies for analysis. Upper Saddle River, N.J: Merrill.
Παραπομπή Chicago StyleGay, L. R. Educational Research: Competencies for Analysis. Upper Saddle River, N.J: Merrill, 1996.
Παραπομπή MLAGay, L. R. Educational Research: Competencies for Analysis. Upper Saddle River, N.J: Merrill, 1996.
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