United Nations Department of Economic and Social Affairs. (2013). World economic and social survey 2013: Sustainable development challenges. United Nations.
Chicago-Zitierstil (17. Ausg.)United Nations Department of Economic and Social Affairs. World Economic and Social Survey 2013: Sustainable Development Challenges. New York: United Nations, 2013.
MLA-Zitierstil (9. Ausg.)United Nations Department of Economic and Social Affairs. World Economic and Social Survey 2013: Sustainable Development Challenges. United Nations, 2013.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.