Velez, F. C. Bulacan Gov. Promotes Organic Farming. Manila Bulletin.
芝加哥风格引文Velez, Freddie C. "Bulacan Gov. Promotes Organic Farming." Manila Bulletin .
MLA引文Velez, Freddie C. "Bulacan Gov. Promotes Organic Farming." Manila Bulletin, .
警告：这些引文格式不一定是100％准确.