Yuen, C. K. (2007). Ringing the changes: A study of language variation and use in the business correspondence of executives in a financial institution in Malaysia. Fakulti Sains Sosial Dan Kemanusiaan, Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Yuen, Chee Keong. Ringing the Changes: A Study of Language Variation and Use in the Business Correspondence of Executives in a Financial Institution in Malaysia. Bangi: Fakulti Sains Sosial Dan Kemanusiaan, Universiti Kebangsaan Malaysia, 2007.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Yuen, Chee Keong. Ringing the Changes: A Study of Language Variation and Use in the Business Correspondence of Executives in a Financial Institution in Malaysia. Fakulti Sains Sosial Dan Kemanusiaan, Universiti Kebangsaan Malaysia, 2007.
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