APA (7 वां संस्करण) प्रशस्ति पत्र

Costa, D. L. (1997). Unequal at birth: A long-term comparison of income and birth weight. National Bureau of Economic Research.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Costa, Dora L. Unequal at Birth: A Long-term Comparison of Income and Birth Weight. Cambridge: National Bureau of Economic Research, 1997.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Costa, Dora L. Unequal at Birth: A Long-term Comparison of Income and Birth Weight. National Bureau of Economic Research, 1997.

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