Orig, T. S. (1997). Laguna de Bay: A bottomless, sink [series]. Manila Bulletin.
芝加哥风格引文Orig, Thor S. "Laguna De Bay: A Bottomless, Sink [series]." Manila Bulletin 1997.
MLA引文Orig, Thor S. "Laguna De Bay: A Bottomless, Sink [series]." Manila Bulletin, 1997.
警告：这些引文格式不一定是100％准确.