Opeña, M. L. R. (1998). The conversion of Busali Farm: Its political implications to the province of Biliran.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOpeña, Mario Lydinno R. The Conversion of Busali Farm: Its Political Implications to the Province of Biliran. 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOpeña, Mario Lydinno R. The Conversion of Busali Farm: Its Political Implications to the Province of Biliran. 1998.
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