De Leon, I. C. (2001). Solid Waste Law signed to Address garbage problem. Manila Bulletin.
芝加哥风格引文De Leon, Isabel C. "Solid Waste Law Signed to Address Garbage Problem." Manila Bulletin 2001.
MLA引文De Leon, Isabel C. "Solid Waste Law Signed to Address Garbage Problem." Manila Bulletin, 2001.
警告：这些引文格式不一定是100％准确.