APA (7 वां संस्करण) प्रशस्ति पत्र

Olivera, B. T. (1974). The press and free elections [microform]. Photoduplication Service, University of the Philippines Library.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Olivera, B. T. The Press and Free Elections [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1974.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Olivera, B. T. The Press and Free Elections [microform]. Photoduplication Service, University of the Philippines Library, 1974.

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