World Resources Institute & United Nations Environment Programme. (1986). World resources. World Resources Institute.
Chicagoスタイル(17版)引用形式World Resources Institute , United Nations Environment Programme. World Resources. Washington, D.C.: World Resources Institute, 1986.
MLA(9版)引用形式World Resources Institute , United Nations Environment Programme. World Resources. World Resources Institute, 1986.
警告: この引用は必ずしも正確ではありません.