United Nations. Economic Commission for Europe & Symposium of the Committee on Gas, Economic Commission for Europe (ECE). (1990). Underground storage of natural gas and LPG. United Nations.
Chicagoスタイル(17版)引用形式United Nations. Economic Commission for Europe , Economic Commission for Europe (ECE) Symposium of the Committee on Gas. Underground Storage of Natural Gas and LPG. New York: United Nations, 1990.
MLA(9版)引用形式United Nations. Economic Commission for Europe , Economic Commission for Europe (ECE) Symposium of the Committee on Gas. Underground Storage of Natural Gas and LPG. United Nations, 1990.
警告: この引用は必ずしも正確ではありません.