United Nations. Dept. of Economic and Social Affairs. (1977). Levels and trends of fertility throughout the world, 1950-1970. United Nations.
Citazione stile Chigago Style (17a edizione)United Nations. Dept. of Economic and Social Affairs. Levels and Trends of Fertility Throughout the World, 1950-1970. New York: United Nations, 1977.
Citatione MLA (9a ed.)United Nations. Dept. of Economic and Social Affairs. Levels and Trends of Fertility Throughout the World, 1950-1970. United Nations, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.