APA

United Nations. Economic Commission for Europe, Report ECE/EB.AIR/27, . (1991). Strategies and policies for air pollution abatement. 1990 major review. Geneve: United Nations. Economic Commission for Europe.

Chicago

United Nations. Economic Commission for Europe, Report ECE/EB.AIR/27, . 1991. Strategies and policies for air pollution abatement. 1990 major review. Geneve: United Nations. Economic Commission for Europe.

Harvard

United Nations. Economic Commission for Europe, Report ECE/EB.AIR/27, . (1991). Strategies and policies for air pollution abatement. 1990 major review. Geneve: United Nations. Economic Commission for Europe.

MLA

United Nations. Economic Commission for Europe, Report ECE/EB.AIR/27, . Strategies and policies for air pollution abatement. 1990 major review. Geneve: United Nations. Economic Commission for Europe. 1991.