Mathisen, M. E. (1981). Plio-Pleistocene geology of the central Cagayan Valley, northern Luzon, Philippines.
芝加哥风格引文Mathisen, Mark Evan. Plio-Pleistocene Geology of the Central Cagayan Valley, Northern Luzon, Philippines. 1981.
MLA引文Mathisen, Mark Evan. Plio-Pleistocene Geology of the Central Cagayan Valley, Northern Luzon, Philippines. 1981.
警告：这些引文格式不一定是100％准确.