Costa, D. L. (1999). American living standards: Evidence from recreational expenditures. National Bureau of Economic Research.
Chicago-referens (17:e uppl.)Costa, Dora L. American Living Standards: Evidence from Recreational Expenditures. Cambridge: National Bureau of Economic Research, 1999.
MLA-referens (9:e uppl.)Costa, Dora L. American Living Standards: Evidence from Recreational Expenditures. National Bureau of Economic Research, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.