Romulo, R. R. (1999). PECC' 99: The Pacific economy in the 21st century. Manila Bulletin.
芝加哥风格引文Romulo, Roberto R. "PECC' 99: The Pacific Economy in the 21st Century." Manila Bulletin 1999.
MLA引文Romulo, Roberto R. "PECC' 99: The Pacific Economy in the 21st Century." Manila Bulletin, 1999.
警告：这些引文格式不一定是100％准确.