توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Gatacilo, T. L. (1976). Instructional practices in the social studies in Grades V and VI in the Division of Northern Samar [microform]. Photoduplication Service, University of the Philippines Library.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Gatacilo, Tomas L. Instructional Practices in the Social Studies in Grades V and VI in the Division of Northern Samar [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1976.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Gatacilo, Tomas L. Instructional Practices in the Social Studies in Grades V and VI in the Division of Northern Samar [microform]. Photoduplication Service, University of the Philippines Library, 1976.