Não informado. (2003). Data processing in education. Data Processing in Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Data Processing in Education. Philadelphia, Pa: Data Processing in Education, 2003.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Data Processing in Education. Data Processing in Education, 2003.
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