Tan, D. (1979). An analysis of the use of modal auxiliaries as indicators of modality and modulation in letters to the English language newspapers in Peninsular Malaysia, October, 1976.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Tan, Dora. An Analysis of the Use of Modal Auxiliaries as Indicators of Modality and Modulation in Letters to the English Language Newspapers in Peninsular Malaysia, October, 1976. 1979.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Tan, Dora. An Analysis of the Use of Modal Auxiliaries as Indicators of Modality and Modulation in Letters to the English Language Newspapers in Peninsular Malaysia, October, 1976. 1979.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.