APA (7th ed.) Zitazioa

United Nations. Economic Commission for Europe. (1991). Energy reforms in Central and Eastern Europe: The first year. United Nations.

Chicago Style (17th ed.) Zitazioa

United Nations. Economic Commission for Europe. Energy Reforms in Central and Eastern Europe: The First Year. New York: United Nations, 1991.

MLA (9th ed.) Zitazioa

United Nations. Economic Commission for Europe. Energy Reforms in Central and Eastern Europe: The First Year. United Nations, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.