Hansen, A., & Drews, D. (2005). Children's errors in mathematics: Understanding common misconceptions in primary schools. Learning Matters.
Citazione stile Chigago Style (17a edizione)Hansen, Alison, e Doreen Drews. Children's Errors in Mathematics: Understanding Common Misconceptions in Primary Schools. Exeter: Learning Matters, 2005.
Citatione MLA (9a ed.)Hansen, Alison, e Doreen Drews. Children's Errors in Mathematics: Understanding Common Misconceptions in Primary Schools. Learning Matters, 2005.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.