Riddell, R. (2004). Sustainable urban planning: Tipping the balance. Blackwell.
Cita Chicago (17th ed.)Riddell, Robert. Sustainable Urban Planning: Tipping the Balance. Oxford: Blackwell, 2004.
Cita MLA (9th ed.)Riddell, Robert. Sustainable Urban Planning: Tipping the Balance. Blackwell, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.