Citazione Stile APA (7a Edizione)

U.S. Bureau of the Census. (1971). The two-child family and population growth: An international view. International Demographic Statistics Center.

Citazione stile Chigago Style (17a edizione)

U.S. Bureau of the Census. The Two-child Family and Population Growth: An International View. Washington, D.C: International Demographic Statistics Center, 1971.

Citatione MLA (9a ed.)

U.S. Bureau of the Census. The Two-child Family and Population Growth: An International View. International Demographic Statistics Center, 1971.