Villegas, B. M. (2001). Effecitve ways of helping the poor. Manila Bulletin.
芝加哥风格引文Villegas, Bernardo M. "Effecitve Ways of Helping the Poor." Manila Bulletin 2001.
MLA引文Villegas, Bernardo M. "Effecitve Ways of Helping the Poor." Manila Bulletin, 2001.
警告：这些引文格式不一定是100％准确.