Nang, A. L. (1980). Relationships of some attitudial aspects of second language learning to proficiency in Pilipino [microform]. Photoduplication Service, University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Nang, Antonio L. Relationships of Some Attitudial Aspects of Second Language Learning to Proficiency in Pilipino [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1980.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Nang, Antonio L. Relationships of Some Attitudial Aspects of Second Language Learning to Proficiency in Pilipino [microform]. Photoduplication Service, University of the Philippines Library, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.