Lua APA (7ú heag.)

Economic Commission for Europe- UN. (1992). East -West Energy Efficiency: The Ace Energy Series. United Nations.

Lua i Stíl Chicago (17ú heag.)

Economic Commission for Europe- UN. East -West Energy Efficiency: The Ace Energy Series. New York: United Nations, 1992.

Lua MLA (9ú heag.)

Economic Commission for Europe- UN. East -West Energy Efficiency: The Ace Energy Series. United Nations, 1992.

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