Osias, C. O. (1977). Balasahon sang banwahanon; naha-una nga bahin [microform]. Photoduplication Service. University of the Philippines Library.
Citazione stile Chigago Style (17a edizione)Osias, Camilo Olaviano. Balasahon Sang Banwahanon; Naha-una Nga Bahin [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Citatione MLA (9a ed.)Osias, Camilo Olaviano. Balasahon Sang Banwahanon; Naha-una Nga Bahin [microform]. Photoduplication Service. University of the Philippines Library, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.