United Nations. Department of International Economic and Social Affairs & International Labour Organisation. (1988). World demographic estimates and projections, 1950-2025 : total population, school-age population, economically active population, agricultural and non-agricultural population, urban and rural population: A report. United Nations. Dept. of International Economic and Social Affairs.
Citazione stile Chigago Style (17a edizione)United Nations. Department of International Economic and Social Affairs e International Labour Organisation. World Demographic Estimates and Projections, 1950-2025 : Total Population, School-age Population, Economically Active Population, Agricultural and Non-agricultural Population, Urban and Rural Population: A Report. New York: United Nations. Dept. of International Economic and Social Affairs, 1988.
Citatione MLA (9a ed.)United Nations. Department of International Economic and Social Affairs e International Labour Organisation. World Demographic Estimates and Projections, 1950-2025 : Total Population, School-age Population, Economically Active Population, Agricultural and Non-agricultural Population, Urban and Rural Population: A Report. United Nations. Dept. of International Economic and Social Affairs, 1988.