U.S. Bureau of the Census. (1971). The two-child family and population growth: An international view. International Demographic Statistics Center.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रU.S. Bureau of the Census. The Two-child Family and Population Growth: An International View. Washington, D.C: International Demographic Statistics Center, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रU.S. Bureau of the Census. The Two-child Family and Population Growth: An International View. International Demographic Statistics Center, 1971.
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