(1997). Reducing greenhouse gas emissions: The role of voluntary programmes. Paris : Washington: United Nations Environment Programme. Industry and Environment Programme Activity Centre United States Environmental Protection Agency. Atmospheric Pollution Prevention Division.
Παραπομπή Chicago StyleReducing Greenhouse Gas Emissions: The Role of Voluntary Programmes. Paris : Washington: United Nations Environment Programme. Industry and Environment Programme Activity Centre United States Environmental Protection Agency. Atmospheric Pollution Prevention Division, 1997.
Παραπομπή MLAReducing Greenhouse Gas Emissions: The Role of Voluntary Programmes. Paris : Washington: United Nations Environment Programme. Industry and Environment Programme Activity Centre United States Environmental Protection Agency. Atmospheric Pollution Prevention Division, 1997.