United Nations. (2008). Urban and rural areas 2007. United Nations.
Chicagoスタイル(17版)引用形式United Nations. Urban and Rural Areas 2007. United States of America: United Nations, 2008.
MLA(9版)引用形式United Nations. Urban and Rural Areas 2007. United Nations, 2008.
警告: この引用は必ずしも正確ではありません.