Riddell, R. (2004). Sustainable urban planning: Tipping the balance. Blackwell.
Chicago Style (17th ed.) ZitazioaRiddell, Robert. Sustainable Urban Planning: Tipping the Balance. Oxford: Blackwell, 2004.
MLA (9th ed.) ZitazioaRiddell, Robert. Sustainable Urban Planning: Tipping the Balance. Blackwell, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.