Ong, C. T. L. (1996). Student and lecturer perceptions: A survey of the oral communication component of the general proficiency programme at Institut Teknologi Mara. Fakulti of Language Studies, Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ong, Carol Teck Lan. Student and Lecturer Perceptions: A Survey of the Oral Communication Component of the General Proficiency Programme at Institut Teknologi Mara. Bangi: Fakulti of Language Studies, Universiti Kebangsaan Malaysia, 1996.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ong, Carol Teck Lan. Student and Lecturer Perceptions: A Survey of the Oral Communication Component of the General Proficiency Programme at Institut Teknologi Mara. Fakulti of Language Studies, Universiti Kebangsaan Malaysia, 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.