Não informado. (1999). Environment and Urbanization. International Institute for Environment and Development, Human Settlements Programme.
Chicago-Zitierstil (17. Ausg.)Não informado. Environment and Urbanization. London: International Institute for Environment and Development, Human Settlements Programme, 1999.
MLA-Zitierstil (8. Ausg.)Não informado. Environment and Urbanization. International Institute for Environment and Development, Human Settlements Programme, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.