Ortinero, A. M. (1978). The concept of fact [microform]. Photoduplication Service. University of the Philippines Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOrtinero, Aniceta M. The Concept of Fact [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1978.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOrtinero, Aniceta M. The Concept of Fact [microform]. Photoduplication Service. University of the Philippines Library, 1978.
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