Tobias, C. M. (1999). Archaeological History of Cagayan Province. Hukay.
芝加哥风格引文Tobias, Carol M. "Archaeological History of Cagayan Province." Hukay 1999.
MLA引文Tobias, Carol M. "Archaeological History of Cagayan Province." Hukay, 1999.
警告：这些引文格式不一定是100％准确.