Collins, D. (2010). Portfolios of the poor: How the world's poor live on $ 2 a day. Princeton University Press ; Permanent Black.
芝加哥风格引文Collins, Daryl. Portfolios of the Poor: How the World's Poor Live on $ 2 a Day. Princeton : Delhi: Princeton University Press ; Permanent Black, 2010.
MLA引文Collins, Daryl. Portfolios of the Poor: How the World's Poor Live on $ 2 a Day. Princeton University Press ; Permanent Black, 2010.
警告：这些引文格式不一定是100％准确.