Great Britain. Office for Standards in Education. (1993). The teaching and learning of number in primary schools: National Curriculum mathematics. HMSO.
Cita Chicago (17th ed.)Great Britain. Office for Standards in Education. The Teaching and Learning of Number in Primary Schools: National Curriculum Mathematics. London: HMSO, 1993.
Cita MLA (9th ed.)Great Britain. Office for Standards in Education. The Teaching and Learning of Number in Primary Schools: National Curriculum Mathematics. HMSO, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.