(2007). Indicators of sustainable development: Guidelines and methodologies (3. ed., October 2007.). United Nations.
Chicago-Zitierstil (17. Ausg.)Indicators of Sustainable Development: Guidelines and Methodologies. 3. ed., October 2007. New York: United Nations, 2007.
MLA-Zitierstil (9. Ausg.)Indicators of Sustainable Development: Guidelines and Methodologies. 3. ed., October 2007. United Nations, 2007.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.