Pefianco, R. V. (2001). Must tourism leave the southern islets. Manila Bulletin.
芝加哥风格引文Pefianco, Romeo V. "Must Tourism Leave the Southern Islets." Manila Bulletin 2001.
MLA引文Pefianco, Romeo V. "Must Tourism Leave the Southern Islets." Manila Bulletin, 2001.
警告：这些引文格式不一定是100％准确.