Rotor, D. R. A study of the development, practices and contributions of S.V.D. institutions in the Province of Abra [microform]. Photoduplication Service.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Rotor, Demetrio R. A Study of the Development, Practices and Contributions of S.V.D. Institutions in the Province of Abra [microform]. Quezon City: Photoduplication Service.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Rotor, Demetrio R. A Study of the Development, Practices and Contributions of S.V.D. Institutions in the Province of Abra [microform]. Photoduplication Service.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.