Ward, C. S. (1994). Comparison of some of the spoken and written registers of Singapore with reference to the implications of such a comparison to teaching.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ward, Christopher Stephen. Comparison of Some of the Spoken and Written Registers of Singapore with Reference to the Implications of Such a Comparison to Teaching. 1994.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ward, Christopher Stephen. Comparison of Some of the Spoken and Written Registers of Singapore with Reference to the Implications of Such a Comparison to Teaching. 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.