Hansen, A. (2011). Children's errors in mathematics: Understanding common misconceptions in primary schools (2nd ed.). Learning Matters.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hansen, Alison. Children's Errors in Mathematics: Understanding Common Misconceptions in Primary Schools. 2nd ed. Exeter, U.K: Learning Matters, 2011.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Hansen, Alison. Children's Errors in Mathematics: Understanding Common Misconceptions in Primary Schools. 2nd ed. Learning Matters, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.