APA (7th ed.) Citation

Portela, S. R. (2008). Urban road congestion charging: The case of Porto.

Chicago Style (17th ed.) Citation

Portela, Simão Resende. Urban Road Congestion Charging: The Case of Porto. 2008.

MLA (8th ed.) Citation

Portela, Simão Resende. Urban Road Congestion Charging: The Case of Porto. 2008.

Warning: These citations may not always be 100% accurate.