Philippines. Environmental Management Bureau. (1989). Ecological profile of Batangas. The Bureau.
芝加哥风格引文Philippines. Environmental Management Bureau. Ecological Profile of Batangas. [Quezon City]: The Bureau, 1989.
MLA引文Philippines. Environmental Management Bureau. Ecological Profile of Batangas. The Bureau, 1989.
警告：这些引文格式不一定是100％准确.