Olivera, B. T. (1974). The press and free elections [microform]. Photoduplication Service, University of the Philippines Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOlivera, B. T. The Press and Free Elections [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1974.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOlivera, B. T. The Press and Free Elections [microform]. Photoduplication Service, University of the Philippines Library, 1974.
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