Del Prado, M. G. (1981). Ibalon: Ethnohistory of the Bikol Region. AMS Press.
芝加哥风格引文Del Prado, Mariano Goyena. Ibalon: Ethnohistory of the Bikol Region. Legazpi City: AMS Press, 1981.
MLA引文Del Prado, Mariano Goyena. Ibalon: Ethnohistory of the Bikol Region. AMS Press, 1981.
警告：这些引文格式不一定是100％准确.