United States. Bureau of the Census. Population Division. (1978). World population, 1977: Recent demographic estimates for the countries and regions of the world. U. S. Government Printing Office.
Citação do estilo Chicago (17ª ed.)United States. Bureau of the Census. Population Division. World Population, 1977: Recent Demographic Estimates for the Countries and Regions of the World. Washington: U. S. Government Printing Office, 1978.
Citação MLA (9ª ed.)United States. Bureau of the Census. Population Division. World Population, 1977: Recent Demographic Estimates for the Countries and Regions of the World. U. S. Government Printing Office, 1978.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.