Não informado. (1969). Journal of Development Planning. United Nations, Department of Economic and Social Affairs.
Chicago-Zitierstil (17. Ausg.)Não informado. Journal of Development Planning. New York: United Nations, Department of Economic and Social Affairs, 1969.
MLA-Zitierstil (8. Ausg.)Não informado. Journal of Development Planning. United Nations, Department of Economic and Social Affairs, 1969.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.