Office of Her Majesty's Chief Inspector of Schools. (1993). The teaching and learning of number in primary schools: National Curriculum mathematics : Attainment Target 2. HMSO.
Παραπομπή σε μορφή Chicago (17η εκδ.)Office of Her Majesty's Chief Inspector of Schools. The Teaching and Learning of Number in Primary Schools: National Curriculum Mathematics : Attainment Target 2. London: HMSO, 1993.
Παραπομπή σε μορφή MLA (9th εκδ.)Office of Her Majesty's Chief Inspector of Schools. The Teaching and Learning of Number in Primary Schools: National Curriculum Mathematics : Attainment Target 2. HMSO, 1993.
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