APA (7e ed.) Bronvermelding

Rotor, D. R. A study of the development, practices and contributions of S.V.D. institutions in the Province of Abra [microform]. Photoduplication Service.

Chicago (17e ed.) Bronvermelding

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.

MLA (9e ed.) Bronvermelding

Rotor, Demetrio R. A Study of the Development, Practices and Contributions of S.V.D. Institutions in the Province of Abra [microform]. Photoduplication Service.