Portugal, M. R. B., & Joaquin, N. B. (2014). Multiple model approach: Effects on student conceptual and procedural understanding of fraction. College of Education, University of the Philippines Diliman.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Portugal, Mary Rose B., و Nympha Beltran Joaquin. Multiple Model Approach: Effects on Student Conceptual and Procedural Understanding of Fraction. Quezon City: College of Education, University of the Philippines Diliman, 2014.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Portugal, Mary Rose B., و Nympha Beltran Joaquin. Multiple Model Approach: Effects on Student Conceptual and Procedural Understanding of Fraction. College of Education, University of the Philippines Diliman, 2014.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.