Foxman, D. D., Ruddock, G., & Thorpe, J. (1989). Graduated tests in mathematics: A study of lower attaining pupils in secondary schools. NFER-Nelson.
Παραπομπή σε μορφή Chicago (17η εκδ.)Foxman, D. D., Graham Ruddock, και Jim Thorpe. Graduated Tests in Mathematics: A Study of Lower Attaining Pupils in Secondary Schools. Windsor, Berkshire: NFER-Nelson, 1989.
Παραπομπή σε μορφή MLA (8th εκδ.)Foxman, D. D., et al. Graduated Tests in Mathematics: A Study of Lower Attaining Pupils in Secondary Schools. NFER-Nelson, 1989.
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