Dewitt, D. (2000). Quadratic equation in algebra: Analysis of written responses among form four students mathematics education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Dewitt, Dorothy. Quadratic Equation in Algebra: Analysis of Written Responses Among Form Four Students Mathematics Education. 2000.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Dewitt, Dorothy. Quadratic Equation in Algebra: Analysis of Written Responses Among Form Four Students Mathematics Education. 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.