Prattana, U. (1980). The structure and behavior of imports of Thailand, 1958-1976 [microform]. Photoduplication Service, University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Prattana, Uswarangsri. The Structure and Behavior of Imports of Thailand, 1958-1976 [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1980.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Prattana, Uswarangsri. The Structure and Behavior of Imports of Thailand, 1958-1976 [microform]. Photoduplication Service, University of the Philippines Library, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.