Orn-Anong Hirunburana. (1985). A study of discoursal and textual features of English business correspondence and the implications for the development of instructional materials for advanced Thai commercial students.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Orn-Anong Hirunburana. A Study of Discoursal and Textual Features of English Business Correspondence and the Implications for the Development of Instructional Materials for Advanced Thai Commercial Students. 1985.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Orn-Anong Hirunburana. A Study of Discoursal and Textual Features of English Business Correspondence and the Implications for the Development of Instructional Materials for Advanced Thai Commercial Students. 1985.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.