Churchill, B. R. (1991). Bikol historiography: Trends and prospects. The Journal of History.
芝加哥风格引文Churchill, Bernardita Reyes. "Bikol Historiography: Trends and Prospects." The Journal of History 1991.
MLA引文Churchill, Bernardita Reyes. "Bikol Historiography: Trends and Prospects." The Journal of History, 1991.
警告：这些引文格式不一定是100％准确.