Artiaga, S. Engineering in the Philippines prior to the Spanish conquest. Unitas..
芝加哥风格引文Artiaga, Santiago. "Engineering in the Philippines Prior to the Spanish Conquest." Unitas. .
MLA引文Artiaga, Santiago. "Engineering in the Philippines Prior to the Spanish Conquest." Unitas., .
警告：这些引文格式不一定是100％准确.