Costa, D. L. (1999). American living standards: Evidence from recreational expenditures. National Bureau of Economic Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCosta, Dora L. American Living Standards: Evidence from Recreational Expenditures. Cambridge: National Bureau of Economic Research, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCosta, Dora L. American Living Standards: Evidence from Recreational Expenditures. National Bureau of Economic Research, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.