United Nations. (1964). Studie in long term eco. projections. U.N.
Chicagoスタイル(17版)引用形式United Nations. Studie in Long Term Eco. Projections. New York: U.N, 1964.
MLA(9版)引用形式United Nations. Studie in Long Term Eco. Projections. U.N, 1964.
警告: この引用は必ずしも正確ではありません.