APA (7e ed.) Bronvermelding

Costa, D. L. (1999). American living standards: Evidence from recreational expenditures. National Bureau of Economic Research.

Chicago (17e ed.) Bronvermelding

Costa, Dora L. American Living Standards: Evidence from Recreational Expenditures. Cambridge: National Bureau of Economic Research, 1999.

MLA (9e ed.) Bronvermelding

Costa, Dora L. American Living Standards: Evidence from Recreational Expenditures. National Bureau of Economic Research, 1999.