Lauchachinda, C. (1977). Congruence of circles associated with a given surface [microform]. Photoduplication Service. University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lauchachinda, Chintana. Congruence of Circles Associated with a Given Surface [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Lauchachinda, Chintana. Congruence of Circles Associated with a Given Surface [microform]. Photoduplication Service. University of the Philippines Library, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.