Ong, S. H. (2000). Understanding of algebraic notation and its relationship with cognitive development among form four students.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ong, Saw Hoon. Understanding of Algebraic Notation and Its Relationship with Cognitive Development Among Form Four Students. 2000.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ong, Saw Hoon. Understanding of Algebraic Notation and Its Relationship with Cognitive Development Among Form Four Students. 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.