Não informado. (1994). Mathematics Teaching in the Middle School. National Council of Teachers of Mathematics.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Mathematics Teaching in the Middle School. Reston, Va: National Council of Teachers of Mathematics, 1994.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Mathematics Teaching in the Middle School. National Council of Teachers of Mathematics, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.