United Nations Human Settlements Programme. (2009). Planning sustainable cities: Policy directions global report on human settlements 2009 (Abridged ed.). Earthscan.
Cita Chicago (17th ed.)United Nations Human Settlements Programme. Planning Sustainable Cities: Policy Directions Global Report on Human Settlements 2009. Abridged ed. London: Earthscan, 2009.
Cita MLA (9th ed.)United Nations Human Settlements Programme. Planning Sustainable Cities: Policy Directions Global Report on Human Settlements 2009. Abridged ed. Earthscan, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.