Costa, D. L. (1999). American living standards: Evidence from recreational expenditures. National Bureau of Economic Research.
芝加哥风格引文Costa, Dora L. American Living Standards: Evidence from Recreational Expenditures. Cambridge: National Bureau of Economic Research, 1999.
MLA引文Costa, Dora L. American Living Standards: Evidence from Recreational Expenditures. National Bureau of Economic Research, 1999.
警告：这些引文格式不一定是100％准确.