Churchill, B. R. (1991). Bikol historiography: Trends and prospects. The Journal of History.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रChurchill, Bernardita Reyes. "Bikol Historiography: Trends and Prospects." The Journal of History 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रChurchill, Bernardita Reyes. "Bikol Historiography: Trends and Prospects." The Journal of History, 1991.
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