Cita APA (7a ed.)

(2011). Cities of tomorrow: Challenges, visions, ways forward. Publications Office of the European Union.

Cita Chicago Style (17a ed.)

Cities of Tomorrow: Challenges, Visions, Ways Forward. Luxembourg: Publications Office of the European Union, 2011.

Cita MLA (9a ed.)

Cities of Tomorrow: Challenges, Visions, Ways Forward. Publications Office of the European Union, 2011.