Não informado. (2004). World population. U.S. Department of Commerce, Bureau of the Census.
Chicagoスタイル(17版)引用形式Não informado. World Population. Washington: U.S. Department of Commerce, Bureau of the Census, 2004.
MLA(8版)引用形式Não informado. World Population. U.S. Department of Commerce, Bureau of the Census, 2004.
警告: この引用は必ずしも正確ではありません.