Ang, W. H. (1984). A study of the relative attainment in mathematics of two matched groups of secondary two express and normal stream pupils.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ang, Wai Hoong. A Study of the Relative Attainment in Mathematics of Two Matched Groups of Secondary Two Express and Normal Stream Pupils. 1984.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ang, Wai Hoong. A Study of the Relative Attainment in Mathematics of Two Matched Groups of Secondary Two Express and Normal Stream Pupils. 1984.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.