Osias, C. O. (1977). Balasahon sang banwahanon; naha-una nga bahin [microform]. Photoduplication Service. University of the Philippines Library.
Chicago Style (17th ed.) CitationOsias, Camilo Olaviano. Balasahon Sang Banwahanon; Naha-una Nga Bahin [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
MLA (9th ed.) CitationOsias, Camilo Olaviano. Balasahon Sang Banwahanon; Naha-una Nga Bahin [microform]. Photoduplication Service. University of the Philippines Library, 1977.
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